A group of South Korean special agents were recruited because of their extraordinary abilities to fly, heal, and use their enhanced senses in the field. But after being tasked with carrying out increasingly dubious missions, the agents disappeared without a trace.

With their children now exhibiting similar abilities and a dangerous assassin starting to pick off super-powered individuals, the parents must leave their peaceful lives behind in order to protect their kids from harm and exploitation at the hands of malicious government agencies.