Artist Tae-yi always gets compared to his best friend, Eun-woo. One day, Tae-yi’s girlfriend commits a sudden suicide. Tae-yi starts finding the truth of her death and discovers that the death is related to Eun-woo’ s secret box!

The story revolves around six childhood friends who gather for a retreat at a cabin, each contributing a small amount of money for food and a lottery ticket. When they win the lottery, tensions rise as greed takes over, leading to mysterious deaths and betrayals. As the group fights for the winning ticket, the situation escalates into violence, revealing darker sides of human nature.