A story about a group of people with special abilities who disguise themselves as family members to survive and use unique methods to overcome the vicious criminals who threaten them.

When his nephew dies in a plane crash, stunt man Cha Dal-geon resolves to find out what happened, with the help of covert operative Go Hae-ri.

Sim Deok-soo is a grumpy landlord running a run-down apartment complex. Suddenly his tenants begin disappearing under suspicious circumstances. A retired ex-detective shows up, claiming a serial murderer from 30 years back has returned.