Judge Rosswell Carew's fiance is still missing. Because her last call to him came from a payphone in Sainte Genevieve, Missouri, Carew arranges to hold court there so he can pursue his search for her. When he witnesses someone who resembles Tina tossed from a riverboat ferry, he's plunged into a nightmare world he never knew existed. Rosswell is astounded when he discovers that what he saw and the fate of Tina are intertwined. Unable to convince the local authorities that something deadly is going on, Rosswell teams up with his faithful research assistant Ollie Groton to discover the truth.