Sang-woo, who lives with his older brother, is actually related to his brother-in-law. He has his favorite co-worker in the office, but he can't confess because she seems to have a man. One day the opportunity comes, and all the work in question begins.
Room 503's secret that is more pleasant if you come alone. Kyung-sook inherits a motel from her mother. In that motel with a strange atmosphere, when it's Friday and the clock strikes two in the afternoon, a middle-aged man, Soo-min, and a 'plumber', seem to compete looking for room 503.
Jeonghee is a sister and a couple who allow a relationship with others once a month. I am surprised to learn the shocking fact that I am enjoying'Doom's Day'. Because of the deviation that was allowed, he said, Jung-hee, who is sultry, proposes'Doom's Day' to her husband.