Congress has been pouring billions - seven of them, to be exact - into a hole in the desert and now Senator Clark wants to see what they've bought. He visits the massive complex of Project Tic Toc but is unimpressed when he learns their centerpiece, a "Time Tunnel" that can transfer matter and energy into the past or future, is not quite operational. He plans to leave and pull the plug. Desperate to save the project, scientist Tony Newman operates the not yet perfected Time Tunnel and transfers himself back in time, arriving on... The Deck of the Titanic, hours before her rendezvous with an iceberg. Colleague Doug Phillips, desperate to rescue his young protege, employs the device. Now both men are trapped in the past and dependent on a largely untested prototype time machine to return home!