The Great Hunter (S01E06)

Overwhelmed by guilt, Kai contemplates taking his own life, but Maggie intervenes just in time. She believes in giving her brother a chance to collaborate in uncovering those responsible for the horrific crimes and seeking redemption. Determined to end the ongoing spree of violence, the former police officer embarks on a quest to track down the elusive mastermind known as the "Great Hunter." Their investigation takes them back to 1947, when two men were implicated in a series of brutal murders—one being Maggie's now 90-year-old father, Arthur, while the other has been missing for years. Alongside Roland, Maggie unearths a shocking family secret.