Police officer Mia Coleman is haunted by a case involving a murder-suicide. She calls the Plan B agency, determined to go back in time and prevent the tragedy.

Traveling back in time to prevent a murder-suicide, Mia kidnaps the would-be killer, but her plan backfires, leaving blood on her own hands in her pursuit of justice.

Suspended from duty, Mia's determination to prevent a sexual assault leads her down a path of vigilante justice, blurring the lines between her police work and her personal vendetta.

Mia travels farther back in time to protect Keri from her abusive husband, forcing Mia into proximity with her own ex-boyfriend Bryson and confronting her with the complexities of their relationship.

Mia seeks therapy to address her controlling behaviour. Paul attends counseling while Mia supervises his visits with his daughters. Mia's unresolved issues resurface, leading to a family confrontation.