Mr. Ren is a traditional Chinese father who is not good at expressing himself and tends to hide his emotions. After his son donated his organs before he passed away, Mr. Ren blames himself for not being able to protect his son's heart. He leaves home and travels to get away from his guilt, but is plagued by nightmares. One day, while staying at a hostel, he meets a homeless boy named Danny, who claims to be searching for an organ donor.