Park Dong-won (Kim Sung-kyun), a common man and his family move into a house purchased after 11 years of labour. They throw a housewarming party and invite all friends. A heavy overnight downpour creates an extremely big sinkhole, and in a mere minute, it engulfs the whole house with the people inside it. Deep down the hole, Park Dong-won, his neighbor Jeong Man-soo (Cha Seung-won), and the guests have to find a way out. As the luck would have it rain again begins to pour down, filling the sinkhole with water. They must find out a solution before time runs out to survive….
,%20a%20common%20man%20and%20his%20family%20move%20into%20a%20house%20purchased%20after%2011%20years%20of%20labour.%20They%20throw%20a%20housewarming%20party%20and%20invite%20all%20friends.%20A%20heavy%20overnight%20downpour%20creates%20an%20extremely%20big%20sinkhole,%20and%20in%20a%20mere%20minute,%20it%20engulfs%20the%20whole%20house%20with%20the%20people%20inside%20it.%20Deep%20down%20the%20hole,%20Park%20Dong-won,%20his%20neighbor%20Jeong%20Man-soo%20(Cha%20Seung-won),%20and%20the%20guests%20have%20to%20find%20a%20way%20out.%20As%20the%20luck%20would%20have%20it%20rain%20again%20begins%20to%20pour%20down,%20filling%20the%20sinkhole%20with%20water.%20They%20must%20find%20out%20a%20solution%20before%20time%20runs)
