In downtown Chicago, a young woman named Esther Vaughan disappears from her apartment without a trace. A haunting letter addressed to My Dearest is found among her possessions, leaving her friend and roommate Quinn Collins to wonder where Esther is and whether or not she’s the person Quinn thought she knew. Meanwhile, in a small Michigan harbor town an hour outside Chicago, a mysterious woman appears in the quiet coffee shop where eighteen-year-old Alex Gallo works as a dishwasher. He is immediately drawn to her charm and beauty, but what starts as an innocent crush quickly spirals into something far more dark and sinister than he ever expected.