Booth plays hockey while the team cheers him on. Bones asks why Booth is knocking players over. Booth then is sent to the penalty box for charging an opponent. The team educates Bones on the rules of the game as Booth shouts to be let out of the box. After an opponent knocks down Booth's teammate, Booth and the opponent begin to fight. The team watches as Booth beats the man repeatedly in the head. Booth helps his teammate up and the two exit the ice. Bones says she's not sure how she feels about the game.

Booth goes back to the locker room. Bones walks in and asks if they're alright. She asks Booth if he broke his hand. The guys tell Bones to wait outside.

A dad and his son Leo go ice fishing. They drink beers and the dad uses ice fishing metaphors to tell his son to have safe sex. Leo drills through the ice and blood comes up through the ice. They brush the snow away and see a man frozen under the ice.

The team investigates the body in the ice. Bones says she's not sure if it was murder. Bones tells Booth to stop scratching under the cast on his wrist. Booth then sees something on the body. He pulls up a necklace and says the body belongs to the guy he knocked out at the hockey game. Booth says he's a suspect.

Caroline says Booth is a suspect, so Bones will have to work the case with Agent Payton. Bones says she won't work with anyone other than Booth. Booth smirks and asks who wants to interrogate him.

Camille says the time of death was five days ago. Wendell says that if Booth is a suspect, he should be too. Camille reminds him he was being taken care of by his mother for his hockey injuries.

Payton talks to Booth about the hockey game. Booth says he was mad that the guy hit two of his players, but not mad enough to chase him down after the game. Payton says she has a witness who says he said he threatened to fight the victim off the ice. She then asks if he thinks his family's history of alcohol abuse has made him more prone to violence. Booth gets up and leaves. He confronts Sweets and asks why he's there. Sweets says he has to observe the interview. He then asks if there is sexual tension between him and Payton. Sweets then asks if Booth has his rage under control. Booth tells Sweets to never bring up his old man again, then leaves. Booth returns to Payton and she asks if he works out much.

Wendell says he found the cause of death was a projectile through the left eye. He says there was no bullet wound, so he doesn't know what kind of projectile it was.

Booth, Payton, and Bones go to Pete's apartment. His girlfriend says Pete was a volunteer fireman. She says someone slashed Pete's tires before he disappeared. Booth asks why she didn't report him missing and she says she thought he was seeing someone else. They see a note with the name Albie on it and ask Pete's girlfriend if she knows who it is. She says no. Bones sees Pete's fish are all dead and floating in the tank. Payton sees past due bills and says Pete looks like he couldn't afford to pay the bills. Bones sees blood on Pete's hockey uniform. Booth says it's not surprising. Pete's girlfriend says Pete asked her to borrow $2000. She says she thought that meant he liked her. Bones is confused, but Booth tells Pete's girlfriend she's absolutely right.

Bones goes back to the lab and Camille tells her about the cause of death. Booth sees Pete's tooth is cracked. Camille says he was a hockey player, so that's pretty normal. Hodgins walks in and says the water in Pete's throat was not from the lake. He says it was deionized brine water. Bones suggests that it was from the ice rink. Hodgins says yes and says Pete was killed in the rink, then dumped in the lake. Bones says it's interesting that all the evidence points back to Booth.

Booth and Payton interview hockey players. They say Pete was a fighter and wouldn't go down easily. Two players tell the detectives that Pete got into a fight with a guy named Lou at the last game. They tell the detectives to talk to Chloe, an ice skater who sleeps with all the players.

The detectives talk to Chloe and she says she and Pete had a casual relationship. Chloe says they had an open relationship, but she knows he wasn't sleeping with anyone else. Booth says he was, then Chloe asks who. Payton then tells Chloe they think she killed Pete. Chloe then admits she knew he was sleeping with someone else. Payton asks who Albie is and Chloe says it is a guy who runs a poker table. Chloe then asks who Pete was sleeping with and the detectives leave.

Bones looks at the skeleton and sees a pattern that looks like he was struck repeatedly. Wendell says the padding would have protected him, so it wasn't during a game. Wendell tells the doctors he missed something. Bones scolds him and he runs off. Camille tells Bones she was supposed to tell him anyone would have missed that. Bones says Booth says she sucks at non verbal communication.