Ninjas existed throughout many pivotal times in Japanese history - but what if they were still secretly undertaking missions in modern society? Set in today's Japan, this series tells the story of the Tawara family, the last ninja clan that abandoned its roots after a particular mission. Now, the family must face the biggest crisis Japan has seen yet - one that threatens to shake the nation to its core.

The series stars Kento Kaku, who also serves as a co-executive producer. He approached this series with heightened motivation, saying he has bet staked life on this work. Kaku plays Haru, the second son of the Tawara family. Although he is an elite ninja with unrivaled skills, Haru's kindness led to disaster and a great trauma that still haunts him. The actors portraying Haru's family are Yosuke Eguchi as his father Soichi, Tae Kimura as his mother Yoko, Kengo Kora as his older brother Gaku, Aju Makita as his older sister Nagi, and Nobuko Miyamoto as his mysterious grandmother Taki, who watches the family from the shadows.