Nations all around the world wage a secret intelligence war. Two countries, Ostania and Westalis, have been in a cold war for over a decade.

A renowned spy, codename Twilight, serves WISE, Westalis’s intelligence bureau, and is assigned to investigate Donovan Desmond, leader of Ostania’s Unity Party, and a person of interest in the countries’ fight for peace.

This top-secret mission is “Operation Strix”. The directive: “Fabricate a family within a week, and enroll your children in Desmond’s sons’ school.”

But the “daughter” that Twilight has recruited is a mind-reader, his “wife”, an assassin! They join his family for their own motives, and live under the same roof, keeping their secrets hidden.

Is this family, with its eccentricities, capable of saving the world?