Sheldon and Amy struggle to figure out what the "perfect" wedding gift they received from Leonard and Penny actually is.

Meanwhile, Raj decides he's tired of being alone and finally wants to settle down, so he asks his father to arrange a marriage for him, and Stuart asks Denise out on a date.

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Guest Stars: Kevin Sussman as Stuart, Brian George as Dr. Koothrappali, Brian Posehn as Bert, Lauren Lapkus as Denise, Luis Aldana as Greg, Kikey Castillo as Leslie

Writers: Steve Holland (Story), Steven Molaro (Story), Maria Ferrari (Story), Dave Goetsch (Teleplay), Eric Kaplan (Teleplay), Andy Gordon (Teleplay)

Director: Mark Cendrowski

As the gang eat dinner in the apartment, Sheldon tells them that he and Amy started to feel like a real married couple by the end of their honeymoon. When their friends are underwhelmed when Sheldon and Amy hand out their gifts of “I Heart NY” t-shirts, Sheldon admits they forgot about buying presents in New York and ordered these from Amazon on the plane trip home.

In their apartment, as Sheldon and Amy write thank you cards while opening their wedding gifts, Amy scolds Sheldon for complaining about writing thank you cards in a thank you card. When they get to Leonard and Penny’s gift, Sheldon and Amy have no idea what it is.

As Stuart and Denise flirt with each other at the comic book store, Howard wonders what’s going on between them. Raj mentions that he saw them making out at Sheldon and Amy’s wedding. After Denise leaves work for a class, Howard asks Stuart what’s the deal between them. Stuart explains that they haven’t really talked about the kiss, so he’s not sure where he stands.

In bed that night, Amy says she can’t stop thinking about the present from Leonard and Penny. Sheldon admits it’s driving him crazy too. When Sheldon wants to just ask them what it is, Amy argues that will hurt their feelings. Sheldon isn’t moved, until Amy also says it will prove he wasn’t smart enough to figure it out on his own. Amy says they should just go to sleep and look at it again in the morning with fresh eyes. Seconds later, she changes her mind and decides they should go tear the box apart looking for clues. Sheldon is excited to be staying up past his bedtime, solving mysteries.

In Howard and Bernadette’s kitchen, she wonders what’s wrong with Stuart’s face as he happily prepares dinner. When Bernadette asks why he’s so happy, Stuart explains he asked Denise out on a date and she said yes. After Stuart admits he’s very excited but hasn’t been on a date in a long time, Howard gives him some helpful dating advice.

Sheldon goes over to Leonard and Penny’s apartment to hand deliver a thank you note for their present. When Penny says that they instantly thought Sheldon and Amy had to have it when they saw the item, Sheldon asks her to explain her thinking. After Leonard wonders if Sheldon doesn’t know what it is, Penny sarcastically says he would know as he’s the smartest man in the world. Sheldon tells them he’s going to return home to use their gift in the manner which it was intended. Leonard and Penny think Sheldon will never figure it out and, after they hear Sheldon shouting “What are you?”, Leonard admits this is making him so happy.

In the university cafeteria, Sheldon goes to Howard to ask if he knows what the gift from Leonard and Penny is. Sheldon doesn’t want Howard to say what it is, he just wants to know whether Howard knows, and Howard claims he does. When Sheldon says he and Amy think it’s a scavenger hunt. Asked whether it is a clue that will lead them to the actual present, Howard is excited at the prospect of them traipsing around town looking for clues and confirms Sheldon’s suspicions. When Leonard and Raj arrive at the table, Sheldon thanks Leonard again for the gift before heading out. After Raj asks what Leonard and Penny gave Sheldon and Amy, he explains that it’s a dumb crystal wand that Howard and Bernadette gave them that puzzled them after their wedding. Raj realizes it’s the crystal chakra wand he gave to Howard and Bernadette for their wedding.

Sheldon and Amy are in Bert’s office as he examines the crystal. The geologist explains it’s a silicone dioxide crystal, otherwise known as quartz. When Sheldon and Amy wonder what the significance of quartz is, they look up quartz and realize it comes from the similar German word, “quarz” - no T. As they ponder the meaning of “no T”, they think of the coffee shop where they first met.

At the comic book store, Stuart goes to Raj to ask for his opinion on new colognes he’s been trying ahead of his date with Denise. Stuart admits he really likes Denise and doesn’t want to screw this up. As Raj tells him to relax and just trust his instincts, Raj realizes that this hasn’t exactly been working out for him lately. After a dejected Raj argues he’s made a mess of his life and is now all alone, Stuart thinks it’s best to pretend to take a phone call and walk away.

After Sheldon and Amy arrive at the coffee store where they met to look for a clue, they head to the table at which they sat eight years earlier. Even though there’s people sitting there, Sheldon puts on a rubber glove and starts feeling the underside of the table, but the only thing he finds is discarded chewing gum. After Amy wonders if it’s behind the counter, she’s told to look in the lost and found box. Finding a locket with a rock that might be quartz, they think Leonard and Penny want them to fill it with memories as they start their life together. They also find a pair of sunglasses, which they assume were left for them because their future's so bright. A delighted Sheldon and Amy run out of the store hand in hand.

As Howard and Bernadette make dinner, Stuart knocks on the kitchen door to say he has to show them something but he wants them to promise not to make fun of him. When Stuart opens the door, they see he’s now a shade of orange. Stuart is worried as his date with Denise is in an hour. Bernadette says the spray-tan will fade in a few days, so maybe he should reschedule. After Stuart admits he was really looking forward to tonight, Bernadette tells him to just go and be honest with Denise, who might be flattered at the effort he made to try look good for her.

In his bedroom, Raj starts a video chat with his father. Raj asks his dad to arrange a marriage t for him as he’s so tired of being single and is finally ready to settle down. Dr. Koothrappali explains he can’t just call up some girl’s dad and make her marry him. Raj knows that, but he says he can’t do this on his own and needs his father’s help to find an Indian wife.

In the apartment, Leonard and Penny are baffled as Sheldon and Amy explain what they’ve done with the locket that they supposedly hid in a lost and found box. Sheldon thanks them for three amazing gifts: the locket, the adventure and the realization that he and Amy can do anything if they work together. Sheldon and Amy go on to explain that they wrote them a special thank you note. It’s in a special code and, best of all, they can’t use the Internet to cheat as the answer to this puzzle is now their Wifi password. Leonard is no longer happy about the trick he pulled on Sheldon and Amy. When Raj arrives, he tells them the news: he’s getting married. He explains he hasn’t met her yet, but his father has set him up with a woman named Anu.

When Denise opens her apartment door to Stuart, she is startled by his colour. Stuart admits he was feeling nervous about their date, leading to a series of bad decisions. Denise still wants to go out with him, but admits she’s probably going to spend the evening making fun of him.