In Los Angeles, a duo of detectives delves into cases of stalking. Lt. Beth Davis, a determined and resolute leader, is an authority on persistent harassment, fueled by her own past as a victim. She leads the LAPD’s Threat Assessment Unit, which tackles incidents of stalking, such as voyeurism, cyberharassment, and obsessive infatuation. Jack Larsen, a recent addition to the team with a history of controversial behavior, might find his past experiences beneficial in his new role. The team also includes the enthusiastic young detective Ben Caldwell and the surprisingly astute Janice Lawrence. Together, they strive to prevent situations from escalating while managing their own personal fixations.