A mysterious death warning reveals a conspiracy to steal Wendy Kane's home, prompting her friend Leah Sutton to arrive with armed guards. A year later, a new alert identifies the criminal Night Flight as Leah's brother, Ethan Sutton, who harbors secret feelings for Wendy. Their growing romance provides mutual protection as the computer continues issuing alerts. Suddenly, the system declares Wendy is safe and then disappears entirely.
