Serial killer Gretchen Lowell is on the run, following Detective Archie Sheridan's latest near-fatal encounter with her. When a spleen is discovered at a local rest stop with the rest stop's wall covered in hundreds of tiny red hearts, Detective Henry Sobol decides it's time to contact Archie. Archie has spent the last few months in the city's psychiatric hospital, but soon he find himself investigating a new spate of killings. Could this be the work of a copy-cat? Or has Gretchen really returned?