In 1969, while studying at the University of Maine, artist Alan Parker becomes obsessed with death. Believing he is losing his girlfriend, he tries to commit suicide on his birthday but his friends manage to stop him. He receives news that his mother has had a stroke and decides to hitchhike to visit her at the hospital.

When a renegade Russian general sends a nuclear bomb hurtling toward the Middle East aboard a hijacked train, special agents are dispatched to disarm the deadly device. Ten tons of steel and one ounce of hot plutonium are now riding roughshod through Europe. With time running out, the agents launch a desperate, bullet-packed assault on a deadly moving target piloted by a cold-blooded mercenary.