A middle-aged salaryman kills one man to protect his daughter, then spends twelve episodes proving he's willing to burn down an entire yakuza organization to keep that choice from destroying her. He has no superpowers, no resources, no allies, just a wife who knows what he's capable of and a willingness to think three moves ahead while everyone else is still processing the last one. The show trusts you to understand that sometimes survival means becoming the exact thing you were trying to save your family from, and it doesn't flinch away from what that costs.

Tetsuo Tosu is a middle-aged salaryman living an ordinary life with his wife Kasen. That life shatters when he comes to suspect that their daughter Reika is being abused by her yakuza boyfriend, Nobuto Matori. While digging for evidence at her apartment, Tetsuo is caught by Nobuto, and the fight that follows ends with Nobuto dead. With Kasen's help, Tetsuo hides the body, fearing what the yakuza will do. Things get worse: Nobuto turns out to be the son of the gang's boss, and the Tosu couple become prime suspects in his disappearance. Weak and far from young, Tetsuo has only his wits to shield his family from a merciless investigation in this psychological crime thriller adapted from a manga.