Hello Monster (I Remember You) (2015)

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Genius profiler Lee Hyun, returns home to Korea after something from a case he’s been sent triggers a memory he thought he’d lost forever. Unbeknownst to him, one of his team members, Detective Cha Ji-an, has been investigating him for some time. She is aware that his father was murdered and his brother disappeared under mysterious circumstances involving a criminal named Lee Joon Young -- whom they both want found and incarcerated. Each seeks to unravel the other, unaware that they’ve been drawn into a dangerous game of cat and mouse by a master player and that both truth and evil are closer and far more twisted than they think.