College student "Ai," who is having an affair with a married man, heads to a resort under the guise of an ordinary hot spring trip. However, the resort is an infamous place known for voyeurism and orgies. Brought there by her lover with the truth concealed, she is subjected to one humiliating command after another for the purpose of training. Through these repeated experiences, Ai gradually embraces her inner female masochist, descending further into depravity.