Years after retiring from their formidable ninja lives, a dysfunctional family must return to shadowy missions to counteract a string of looming threats.
After Akira Ninomiya miraculously survives a brutal attack by an unknown assailant wearing a "monster mask," he becomes fixated on finding the attacker and getting revenge.
After causing a major incident, police officer Daigo Agawa takes his wife and daughter to live in the remote mountain village of Kuge. It seems the perfect place to recover from the ordeal, despite the mysterious disappearance of a previous officer posted there. One day, the body of an old woman is found on the mountain. The Goto family says she was attacked by a bear, but Daigo notices a human bite mark. It soon becomes clear that not all is as it seems in the village.
Riho Yoshioka is a Japanese actress. She first attracted attention after landing a role in a television series, Here Comes Asa on NHK in 2016. She received the Elan d'or Award for Newcomer of the Year in 2018.