Mike & Nick & Nick & Alice

After his adopted son Jimmy Boy is released from prison, mob boss Sosa and his men celebrate with a night of partying. Among them is Nick, a loan shark whose wife Alice is having an affair with his fellow criminal Quick Draw Mike. No longer willing to kill, Mike plans to leave Sosa's organization, but agrees to help Nick with a job. Following Nick’s instructions, Mike attempts to chloroform a man he discovers is Nick himself, and learns that the Nick who enlisted his help is from the future, while the present-day Nick escapes.

Mike realizes he has been framed as the informant who betrayed Jimmy, and is now the target of "The Barron", a cannibalistic assassin hired by Sosa. Future Nick explains that six months from that night, he tried to collect a debt from Symon, an inventor and friend of Alice who borrowed money to build a time machine. Triggering the machine, Nick was sent back in time to the night Mike would be killed, inadvertently shooting Symon dead and destroying the machine. While Sosa, Jimmy, and their men enjoy a string of parties, Future Nick and Mike recapture Present Nick at a convenience store, bringing him and Alice to Nick's secret apartment.

Both Present and Future Nick are aware of Mike and Alice's relationship, and acknowledge the unhappy state of their own marriage in an argument about Gilmore Girls. Revealing that Alice is pregnant with Mike's child, Future Nick is determined to save Mike. Lying to Sosa that he has captured Mike, Future Nick lures the Barron to the apartment to ambush him. Present Nick selfishly tries to expose the plan, but is struck with guilt when the Barron kills Mike, though this is only a ruse: the “assassin” is actually Chet, a special effects artist Future Nick recruited to dissuade Present Nick from seeking revenge on Mike.

The real Barron arrives and is shot dead by Future Nick, while Alice kills his henchmen with their own grenade. Future Nick tells Sosa that Mike has killed the hitmen and gone on the run, but Sosa vows to sends his entire organization after him. Unable to prove the true identity of the informant, a beloved but now dead gangster, Mike and the others prepare to eliminate Sosa and all his men at Jimmy's final party.

Sending corrupt police officer Sam to plant weapons throughout the party, Present and Future Nick and a reluctant Mike massacre Sosa's men. Held at gunpoint by Sosa, Alice manages to kill him, but Present Nick is shot in the neck by a dying Jimmy. The others race to save him, singing along with Oasis's "Don't Look Back in Anger" to keep him awake, but Present Nick dies before reaching the hospital. Alice reveals that Symon built another time machine, which Mike activates to embark on a second chance for Nick.