The story is about a husband who overcomes numerous dangers to save his ex-wife, defeating a mysterious giant fish and the evil mastermind behind it. There is an isolated resort hotel by the lake, where biologist Zhang Cheng takes his daughter in search of his ex-wife, Yan Tong, only to find that she has miraculously become younger. Zhang Cheng learns that she has taken a secret beauty product, and he also discovers that strange incidents of tourists disappearing frequently occur at the hotel.