Trama

Sheldon tries to teach the other guys a lesson after they cut him out of a potentially valuable Bitcoin investment seven years ago.

The guys enter the comic book store as Raj is wondering why they are making four new "Avatar" movies. Stuart (Kevin Sussman) announces a special where if someone buys something, they will still have a comic book store to visit. Sheldon starts a conversation on Bitcoins that are now worth $5,000 apiece. Seven years ago the guys minus Sheldon mined some Bitcoins using Howard's old laptop.

Flashback: Entering the old comic book store seven years ago, the guys are talking about the new "Avatar" movie and that Leonard and Penny had just started dating again. Howard is talking to his mother while Sheldon wonders why Leonard was there and not having coitus with Penny. Leonard is worried if Penny is going to stay with him or break up again. Sheldon describes how one has to solve complex mathematical problems to earn the coinage. The guys are totally into spending a whole night trying to accumulate the Bitcoins. Stuart doesn't join it because it is too rich for his blood and Sheldon doesn't because he is worried about the tax implications.

Presently, Sheldon had been telling the story. Raj finishes by saying that Sheldon warned them that someday they would regret it though the guys didn't because they thought they were rich.

In Halley's room, Howard gets out his old laptop from 2010. Raj wants to buy a tiger, while Howard might not tell his wife. Bernadette can hear him over the baby monitor, to which he responds he may put it in Halley's college fund. Howard doesn't find the Bitcoins, but there is a lot of Asian porn on it. There's a private folder on the laptop, though Bernadette had checked that part and none of it's in there.

Flashback: Leonard, Howard and Raj are doing manly things by "mining" on the internet in Howard's old bedroom. The laptop crashes due to all the Asian p...music. Leonard offers to finish using his laptop, but they don't get started until after they have the cookies Mrs. Wolowitz baked.

Back in Halley's room, they realize that they have to check Leonard's old laptop. They run off to find Leonard's computer. Penny, Sheldon and Amy are in apartment 4A discussing wedding plans. The wedding on a cliff overlooking the sea is off due to Sheldon's objections to the beach, cliff and the outdoors. The important thing about a wedding is to do it in front of your friends and family and to never move back into her apartment according to Penny. The guys storm in looking for Leonard's old computer. Sheldon then relates what happened to it.

Flashback: Penny and Bernadette are working at the Cheesecake Factory and Bernadette will not wait on Penny's table, where there sits an annoying person. There sits pre-Sheldon Amy on a date. She has Penny take their picture and then tells her date to leave. She can now prove to her mother that she was on a date. Checking on the guys, Raj is still not able to talk to women. Penny lost an audition because she didn't get the email since her computer is broken. Leonard gives her his computer since he is getting a new one.

Back in 4A, Penny remembers what Leonard did and still thinks that that is so sweet. Unfortunately she gave it to Zack (Brian Thomas Smith). Leonard doesn't think that it was thoughtful to give away his gift; however, she and Penny were broken up at the time. Penny calls Zack to get it as the group goes through a history of all their couple breakups.

Flashback: Penny and Bernadette are at the Cheesecake Factory discussing her breakup with Howard, he had been doing all this weird stuff online. Penny had broken up with Leonard and runs off with Zack.

As the Hofstadters' leave Apartment 4A, Penny can't believe that Leonard is mad about her giving away his laptop. Leonard then explains that Penny giving away his laptop and going out with Zack were clear cut signs that he cared more about their relationship than she did, which she denies.

At Zack's apartment, Zack is glad to see them and that they should do this more often. Zack kept the laptop as he understands the value and appreciation of a gift from someone else (Leonard is satisfied that he knows this). Leonard is still upset that she went back to Zack so quickly. Zack insists that she kept talking about Leonard and was hooked on him because they were so much alike. They were both...people. Zack then adds that he knows how much she was hooked on him because of the video she left on his laptop.

Flashback: Drunk Penny is on Leonard's laptop in her old place. Penny wants to leave Leonard a message to give him an explanation on their breakup. Sheldon knocks on the door and Penny says to go away since she is making a video. Sheldon wants to know why she went out with him in the first place. Because he is great and if she kept going out they would have eventually got married, that was scary and she wasn't ready for that. Also she would have to learn to spell Hofstadter. She asks Sheldon what to do. He replies that she should pass out face down so that she won't choke on her vomit. Penny then does just that. She lies there for two more hours and then falls off the chair.

At Zack's apartment, Leonard is touched that she loved him so much. Penny adds that she did marry him, with Leonard adding that she did it out of love and not out of pity like everyone else said at their wedding toast. Zack and Leonard proceed to watch Penny fall off the chair in the video several times.

The couple return to their apartment with the computer. Raj is not planning on paying his father back for all the money he gave him. On the computer, Howard can't find their coinage. Penny is sure that Zack didn't steal it since he's not smart enough to do so. Sheldon asks them where it might be. Amy tells him to confess. Sheldon downloaded it and shifted to Leonard's Batman flash drive. He wanted to see him sweat and waited seven years to see it, but assures him that he has had the Bitcoin all along; however, Leonard tells him that he lost that key-chain years ago. A now embarrassed Sheldon considers that unfortunate.

Flashback: In the old comic book store four years ago, Stuart is cleaning up and finds a Batman flash drive (presumably Leonard's). He plans to erase it and sell it for $10.

Title reference: The men trying to find their old Bitcoin investment.