The SBPD question Sheldon, the head of the Coin Expo. He tells them that they have taken all necessary precautions with security for the coin. They even have a decoy coin made for extra protection. Frank suggests that in order to determine if the Coin Expo is the target, they need to see if there is an Inside Man working the coin show.
Shawn suggests the Inside Man is the Electrician – a temporary employee hired on after a blackout. Frank convinces Juliet to question the electrician, as he believes she's got the skills in her to get him to crack. She does, and sure enough, she gets the electrician to admit he was hired by a crew of guys and overheard them saying they were going to hit the Expo to steal the penny.
From this, Vick orders that the entire SBPD stakeout the Expo to ensure they catch the criminals. At the Expo, Frank is certain he spots the criminal mastermind undercover and suggests Lassiter order a take down. He does, but the supposed criminal is clean, and Frank was wrong. Frank is starting to crack under the pressure. He isn't finding the culprit like he said he'd be able to.
Just then, Lassiter gets a call telling him that a store called "Prestige Safe Deposit" was just robbed. Shawn determines from this that the criminals realized that the real penny was at Prestige and not at the Expo.
Frank is defeated and embarrassed that he was wrong, so he decides to take himself off the case. They look at the surveillance photos of the crime that took place at Prestige. Shawn Shawnvisions a birthmark on one of the thieves necks which leads him to Shawnvision Flashback to the same birthmark he saw on Frank's sidekick, Kato, whom he met at the mansion. From this, Shawn realizes that it was Frank who engineered the coin con and was the actual coin thief all along.
Shawn tells Frank that he needs to return the coin and make it right with Juliet or risk permanently damaging their relationship. Frank tries to explain his bad behavior, saying that once he was in the SBPD, and he saw the coin opportunity, he couldn't help himself, and decided to engineer the con on the fly. Shawn tells Frank that he will give him time to return the coin and make it right with Juliet. But that is Frank's decision.
Later, Juliet gets a tip about where the coin is. She interrogates the supposed criminal, Chad, just taken into custody after they found the penny in his hotel room. But Juliet quickly realizes that the coin was planted in this guy's room, and that it was her father, the real thief, who planted it there on purpose so that Juliet would get credit for the take down. Since they have no evidence to support an arrest, they have to let Chad go. Turns out, Chad's crew had absolutely zero plans for robbing the expo and that it was Frank who masterminded the whole thing.
A fuming Juliet lets her dad have it and tells him all the reasons why he failed as a father to her. She tells him she never wants to see him again and leaves in tears.
Shawn and Gus are totally defeated by this whole situation. Shawn Shawnvision Flashbacks to evidence from Chad's hotel room that leads him to believe that Chad and his crew are going to rob The Santa Barbara Bowl. Juliet confirms that they did find a series of ticket stubs in Chad's hotel room, so the SBPD heads to The Santa Barbara Bowl to stake it out.
While in the stake out van, Frank shows up. He apologizes to Juliet for everything and tells her that he, in fact, was present at many of her childhood functions, but he never told her because he didn't want his presence to embarrass her, and that Juliet has made him so proud over the years even though she didn't know he was there to witness her accomplishments. Juliet lets this sink in. She is touched and a bit shocked to hear Frank telling her this. Frank leaves the van and immediately notices a suspicious man in a red ball cap and grey sweater. He alerts the team in the van.
Shawn then notices a radio van that looks suspicious. They check the supposed radio station and sure enough, it doesn't exist. The van is the criminals' getaway vessel! Frank has a plan – to let the criminals carry out the act, but when they get back to the van, they won't know that it is Lassiter who is driving them to the police department to be arrested. Frank's plan works, the thieves are finally caught, and Frank has made the first step in redeeming himself in the eyes of his daughter. Their relationship is in no way fixed, but it is a step in the right direction nonetheless.
Juliet admits to Shawn that his heart was always in the right place, and is happy to have her dad there to celebrate her 30th birthday with.