The plot reveals that Sosa and Jimmy Boy targeted Mike under the false belief that he was the informant who sent Jimmy Boy to prison, unleashing a cannibalistic hitman called "The Barron." In the original future timeline, Mike was killed and Alice vanished, leading a guilt-ridden Nick to shake down the inventor Symon, accidentally kill him, and travel six months backward in time.
During the warehouse shootout finale, Present Nick realizes his bitterness caused Mike's death and chooses redemption by taking fatal gunfire meant for Mike. Present Nick's mortal wound causes Future Nick to fade away and die due to timeline collapse. Before dying, Future Nick reveals that Symon built a second time machine prototype, prompting Mike and Alice to use it to jump back in time and rescue Nick, completing their circle of loyalty.