A creature action thriller series about the desperate survival of the survivors among the mutant humans who drank a mysterious black smoke from the sinkhole and soon turned into monsters and quickly became a pandemonium.

Kim Ok-vin, Lee Jun-hyuk, Yoon Jung-hoon, Park Keun-rok, Jang Sung-won, Lee Ha-eun, Kim Byeong-gi, Oh Yu-jin, Song Sang-eun, Lee Ye-bit, Bae Jung-hwa, Im Won-hee, Zo Zee-an, Kim Do-hoon, Kim Su-ol, Heo Hyung-kyu, Jang Myung-kap