Teen misfits Roma, Toto, and Drop call themselves the “Don Glees,” an informal name for their backyard adventures. One day, when the trio gets blamed for a nearby forest fire, they set off into the woods to prove their innocence. As disaster strikes their expedition, tensions flare between the friends as they realize that growing up has taken them on wildly different paths in life.

After his father’s demise at the hand of Gaya Hotel Group, Han Yi Soo (Kim Nam Gil) has lived for one thing only: Vengeance. Ready to hatch a plan to bring down his nemesis once and for all, Yi Soo goes to extremes in not only changing his identity, but also his face. But there's a huge obstacle in Yi Soo's way: his inconvenient love for Jo Hae Woo (Son Ye Jin), the heiress to Gaya Hotel Group. Along with being enmeshed within an ill-fated love, Yi Soo's cover gets blown, which has him running for his life like his father once did. You either sink or you swim, but what if the water is full of sharks?