The lives of Ryu, Hye, Seo Joon, Ara, and Jia go by day after day with few ups and many downs and seem to hold nothing better in store for the future. Things seem to take an unexpected turn when, one rainy Monday in November, a mysterious man comes to them with an unmissable proposal. What the five young guys do not know, however, is that, from that point, their fate is about to change dramatically and that behind that seemingly innocent offer lies a terrible plan and a merciless enemy.