Noticing something strange about his wife's behavior every Friday when she came home late from her part-time job, the husband decided to follow her the next week. He trailed her as she got into a man's car who had come to pick her up, heading toward the man's apartment. After that, his wife stopped answering her phone. The truth behind these subtle changes in their daily life begins to unravel, revealing her hidden side. A story depicting the husband's emotional turmoil as he becomes entangled in a mysterious situation.