How can you attempt to forget your past when it's always sneaking up on you?   Detective Kim Sunggyu has a bad habit he can't shake, and it comes in the form of Nam Woohyun. He thought he'd finally managed to give him up. But when this ghost from those long-forgotten days shows up with a vital clue to Sunggyu's most recent case, he realises he's going to have to face that past of his, and