Former FBI agent turned full-time drifter, Karen Pantelli pursues a promising lead on her long missing mother to Orcas Island, Washington. Toiling as a hotel maid, she reaches a dead end until an encounter with an eccentric math professor raises a gruesome possibility. Her mother may have been murdered by a serial killer, the work of a cunning monster who has claimed hundreds of lives and evaded detection for decades by camouflaging his kills as...