Temperatures reach a boiling point in Niagara Falls as the summer tourists flock to the attractions. Some get more than they bargained for aboard the Maid of the Mist boat tour as a body cascades over the falls and bobs grotesquely in the churning water below. As Homicide Detective Grace Greco plays tour guide to family from out of town, she must cut her visit short to track down a killer. The body count slowly rises with the temperature, but why are so many police officers taking their own lives? Forensic Pathologist James Asher Lane quickly turns the cause of death on its head, opening an illegal can of worms that will place both Grace and James in grave danger. Taking on the very system they proudly work for could spell the end of Detective Grace Greco’s career…and her life.