28-year-old Aleksi is stuck living with her parents. Desperate to escape the safe but boring bourgeois life her family has intended for her, she shirks her duties and becomes entangled with various romantic interests.

Force of Habit follows the lives of various women throughout one day. Hilla is having a romantic vacation, Emmi is throwing a house party, and Milja is on her way to school when they’re approached by a stranger and things take an unexpected turn. At the same time, Emppu, a young actress, is conflicted as she rehearses for the biggest role of her life. Elsewhere, Aleksi, an inexperienced prosecutor, is preparing for his first court case in haste; Niina, the victim of the crime, has been waiting years to see her case tried. Miia throws a company party, and the mood dramatically changes when her colleague Katja opens up about their boss coming on to her. Miia and a couple of her closest colleagues try to resolve the situation, but how do the others react?