Una cella in due

A girl involved in an accident is rescued by a motorist who is a former private detective. The two will journey past a horrifying incident unleashed at a nearby pharmaceutical factory. An epidemic is invading the area, between attempts to escape and shelter from the impending threat at some point, the former private detective will come to realize that the cause of the epidemic is not far from him.

When a mysterious train accident forces a man to change his plans, he is confronted with a series of choices. Each decision he makes leads to a different scenario, each one filmed by a different director with a different cast.