Twenty-five-year-old Frank Devlin is confused and alone in the world. He often leaves home with a specific destination in mind, only to find himself hours later somewhere else, with no idea how he got there. That’s just one of the many reasons he seeks the help of Justin Wright, New York City’s premier clinical psychiatrist. Taking on one of the most challenging cases of his career, Justin is determined to help Frank, a young man with multiple personalities (“alters”), live a happier, more fulfilling life. Little does he know that Frank, and his alters, are secretly weaving themselves into Justin’s life in ways that will affect the Wright family forever.