After the killer strikes close to home, a twist of fate allows a Groundhog Day-type reset, and Laura relives the week prior to the string of murders. Unlike Groundhog Day, she only has one chance. Can she change fate and stop the killer? As she unravels the mysterious connection between herself and the killer, she realizes that fate is written in stone and that changing events will require an ultimate sacrifice.

Laura and Nico, devastated at their failure so far in stopping the city's serial killer, set a trap for him that puts both of them in danger. Meanwhile, Tom becomes worried about Nico and Laura's partnership, since Tom was the attorney who convicted Nico's brother Danny,