Jordan Turner is a veteran 911 operator in Los Angeles who is emotionally shaken after a bungled call leads to a tragic outcome for a young girl. Unable to shake the incident, Jordan is haunted by her perceived failure and steps away from field work to become an instructor, teaching new operators the ropes of handling the intense pressures of emergency response calls. Her life is steeped in the high-stakes world of crisis management, and she remains unsure if she can ever return to answering calls after her previous traumatic experience.

Months later, during a seemingly ordinary day at the call center, Jordan is pulled back into the frontline when a rookie operator receives a distressing call from a teenager named Casey Welson. Casey has been abducted and is calling from the trunk of her captor's car, a situation strikingly similar to Jordan's earlier, ill-fated emergency. Faced with a chance at redemption, Jordan must overcome her fears and utilize her experience and quick thinking to help Casey. With the clock ticking and Casey's life hanging in the balance, Jordan embarks on a fraught mission to support the terrified girl, guiding her to leave clues for the authorities while trying to outsmart the abductor, as the harrowing search to locate and save Casey unfolds.