Police officer Will Shelley relocates to a tranquil island town with his expectant wife, Paige. During a visit to a local hardware store, Paige crosses paths with a hitman known as the Irishman. As Will embarks on his first day at work, he is introduced to his new partner, Terry Brogan, by Captain Murphy. Given the area's unusually low crime rate, Terry opts to visit his girlfriend instead. While in the car, Will receives a call that he misinterprets as a burglary but actually pertains to a sexual activity taking place in a vehicle at the Chetlo residence. As fate would have it, Terry remains unaware of Will's pleas for assistance, prompting Will to respond alone. When he arrives at the scene, a sudden movement from Virginia Chetlo causes him to instinctively discharge his weapon. Shaken by the confrontation, Virginia reacts by attacking Will, which results in an accidental death during their struggle.
Upon Terry's eventual arrival, it becomes clear to both officers that losing their jobs is an imminent consequence of the tragic event. In an attempt to conceal what occurred, the pair concoct a plan to frame the incident as a murder, only to be taken by surprise when Terry discovers a substantial amount of cash hidden in the drawing room. With Will on the verge of fatherhood and Terry contemplating an escape with his girlfriend, the duo decides to stage the scene to resemble a burglary gone awry, stashing the money away in Terry's storage truck. That evening, in a moment of vulnerability, Will confides in Paige about the murder and details regarding the cash while assigning blame to Terry. Concerned about their family's safety, Paige extends an invitation to dinner for Terry to gauge any potential threat he may pose. The dinner unfolds with palpable tension, leaving Paige visibly unsettled in Terry's presence.
As events progress, Virginia's husband, Wallace, who is the only seafood supplier on the island, pleads with law enforcement to bring his wife's murderer to justice. Meanwhile, Murphy develops a suspicion that Wallace could be involved in Virginia's demise and assigns Will and Terry the task of probing deeper into Wallace's affairs. Through their investigation, they uncover that Wallace's seafood business has been struggling financially. Planning to deflect suspicion, they consider framing Wallace for Virginia's murder, motivated by the lucrative life insurance claim. However, a wrench is thrown into their scheme when Wallace's secretary, Deborah, contends that he was with her during the time of the murder. As they dig further, Will and Terry uncover evidence of an affair between Wallace and Deborah. Yet, surveillance footage decisively proves that Wallace had no involvement in his wife's death.
Unbeknownst to Will and Terry, Wallace had previously enlisted the services of a hitman known as the Colombian, intending to kill Virginia on the same day that tragedy struck by Will's hand. Confusion ensues as Wallace mistakenly believes the Colombian is responsible for Virginia's death and the subsequent theft of a bag of cash he had left on the scene. Following a grueling meeting, Wallace realizes that Virginia was dead before the Colombian even arrived. Struggling to manage the fallout, he fears that any attempt to flee with Deborah could label him a suspect. He grows increasingly suspicious of Virginia's masseur, Keith, believing he might have taken the money and killed Virginia. During the investigation, Keith had previously misled Will and Terry to maintain his alibi. With plans to steal the money from Terry's truck already in motion, Keith finds himself at odds with Wallace, leading to a climactic confrontation that ends with Wallace getting shot and killed by Keith’s mother in the heat of the moment. In a tragic twist, Kevin and his mother are subsequently slain by Deborah, who emerges from Wallace's vehicle, creating a chaotic scene that Will witnesses, pondering who to blame for Virginia's death.
In a parallel narrative, as fears escalate that Terry will eliminate Will to get his hands on the cash, Paige makes a troubling decision to hire the Irishman to carry out Terry's hit, using the money from Terry's truck to finance the operation. The Irishman confronts Terry at his boat, initially gaining the upper hand until Terry's girlfriend unexpectedly intervenes, resulting in the Irishman’s demise. Driven by increasing paranoia about Will and Paige, Terry insists that Will proves his innocence by presenting the money, only to discover that it has vanished from the storage truck. Under duress, Will is compelled by Terry at gunpoint to contact Paige, who shockingly admits to taking the cash out of fear that Terry would eliminate them. Enraged by Will's deceit, Terry retaliates by shooting and killing him.
Just as Paige attempts to escape the island with the ill-gotten gains, Terry catches up just in time. Meanwhile, Murphy, growing increasingly skeptical of the duo's stories, investigates the bizarre happenings surrounding Will and Terry, leading him to find Will's lifeless body near the storage dock. When he reaches out to Paige, she spins a tale alleging that Terry had not only killed Virginia but had also slain Will due to his knowledge of the previous crime. As suspicion mounts, Murphy decides to track down Terry, who insists to Paige that Will had killed Virginia. Tensions escalate as Paige's deceit begins to unravel in light of emerging truths. Just then, Murphy arrives and tragically shoots Terry dead.
Ultimately, Paige gives birth to her son but faces interrogation by Murphy, who suspects deeper layers to the unfolding saga. Unfazed, Paige maintains her narrative about Terry's madness. Just when it seems all is settled, the Colombian reenters the picture, eliminating Paige and seizing the money. In the elevator, as the Colombian makes his exit, he is met by Deborah, both realizing their shared ambition, leading to a deadly confrontation where they eliminate each other. Murphy, left to survey the fallout, ultimately adopts Will and Paige's child, a poignant resolution underscoring the depths of betrayal and the chaos of circumstances that transpired.
