A man in a business suit offers the protection of his umbrella to an unsuspecting woman ... and several days later she turns up dead on a river bank, raped and strangled. The terrifying serial killer known in the press as the Rainy Day Killer is now hunting new victims in the city of Glendale ... whenever it rains.

Homicide Lieutenant Hank Donaghue leads the investigation as the killer begins to communicate directly to him through phone calls and grisly packages containing body parts of his victims. Assisted by FBI profiler Ed Griffin, Donaghue and Detective Karen Stainer pursue an elusive predator who leaves no physical evidence behind.

The timing couldn't be worse, however, as Karen Stainer's attention is divided between the investigation and preparations for her upcoming wedding. Distracted and uncertain about her future, Stainer is furious when she learns that the Rainy Day Killer has followed her to Virginia, where the wedding will take place, and that he intends to make her his next victim!