A young man struggles to access sublimated childhood memories. He finds a technique that allows him to travel back into the past, to occupy his childhood body and change history. However, he soon finds that every change he makes has unexpected consequences.
When Chris Murdoch falls obsessively in love with a Japanese girl attending University in Seattle (Kaori Ozaki) he murders Japanese men who have shown her kindness under the pretext of revenge for the attack on Pearl Harbor during WWII. However the ruse involves the FBI in the case, and Agent Sara Daniels. However, the investigation is hampered when Yoko Sugimura of the Tokyo Police arrives to take Kaori back to her influential father. Despite their initial dislike, Sara and Yoko are forced to work together to stop Chris when his obsession is manifest with high explosives.
A tough street kid from the L.A. barrios is discovered during an examination to have stomach tumors. During his hospitalization, he must learn to cope with not only his medical condition, but with people such as other patients, social workers and hospital personnel who come from a totally different world than he does--and they have to learn to cope with him.
A mentally ill man in a small Texas town goes on a killing rampage and is fatally wounded by police. When doctors use an experimental serum to bring him back to life, the killer develops superhuman strength and the town sheriff must pursue him.