The series follows an epidemic that breaks out in Atlanta, leaving the large city quarantined and those stuck on the inside fighting for their lives.

Su Xiaoyi is a single professional photographer who lives with his sickly father afflicted with night blindness. As his siblings are married, the burden of taking care of his ailing father naturally falls on him.

This is a story about a family man who succumbs to weakness and his failure to live a moral life condemns those he loves to an unspeakable horror. Only his path to redemption can save them.