Laura grew up in an orphanage. A large group of children play the game of "one, two, three, look back" every day. They are very friendly. Thirty years later, Laura, who got married and started a family, returned to the abandoned orphanage on the coast with her husband and son. In order to relive the warm memories of their childhood and help more orphans, they decided to rebuild it. However, Simon, his 7-year-old son, has gone wrong since he moved to the house, imagining three children who do not exist to play. Laura and her husband are worried about the adopted son who also suffers from AIDS. Laura's excessive worry disgusted her son. They didn't believe the authenticity of the hallucinations until one day Simon disappeared. After nine months of investigation, Laura began to believe in ghosts and found that it had something to do with a caregiver in her childhood. She settled down and played games with the "children", hoping to save Simon.