Recently divorced and desperate for a job following a string of misfortunes, 30-year-old Stephanie Plum (Katherine Heigl) goes to work at her cousin's bail-bond business, and begins investigating her first case. On the plus side, Stephanie proves to be a resourceful employee with a skill for ferreting out the truth; on the minus side, her first case is that of a Trenton, N.J., cop who broke her heart in high school and now stands accused of murder.