Kim Bong-joo

Su-yeon, a cellist in an orchestra led by her fiancé and conductor Sung-jin, disappears one day, leaving behind only a video recording. Sung-jin is devasted over the loss of Su-yeon, but feels a strong attraction to Mi-ju, a cellist who fills in for his fiancée. Then one rainy night, Sung-jin and Mi-ju get swept away by their mutual desires for each other and commit an unforgivable act at Su-yeon's house.

A Korean man in China takes an assassination job in South Korea to make money and find his missing wife. But when the job is botched, he is forced to go on the run from the police and the gangsters who paid him.

When his wife is murdered, Dong-ho loses the light in his life, breaks down and falls into depression. But he knows that as long as the killer is still around, he can not get out of his loss. Then, one day, he receives a call and can not believe who he is listening to.

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.