A deranged engineer, bent on revenge for the deaths of his wife and daughter, sets two passenger trains on a collision course, and con-man William Shatner puts his life on the line to ward off the crash.

In the early 1800s, a group of fur trappers and Indian traders are returning with their goods to civilization and are making a desperate attempt to beat the oncoming winter. When guide Zachary Bass is injured in a bear attack, they decide he's a goner and leave him behind to die. When he recovers instead, he swears revenge on them and tracks them and their paranoiac expedition leader down.

Reformed drug addict Tim Brett (David Hemmings) is vacationing in Italy with his aunt. When she is murdered, he tries to investigate. Soon his whole life spins out of control.

On the run from her violent husband, Catherine Crocker witnesses a train robbery and is taken prisoner by a frontier outlaw gang, led by a bandit who’s hiding a secret of his own.

Kowalski works for a car delivery service, and takes delivery of a 1970 Dodge Challenger to drive from Colorado to San Francisco. Shortly after pickup, he takes a bet to get the car there in less than 15 hours.