Fable (played by Junichi Okada), a legendary assassin capable of dispatching any target within six seconds, strikes fear into the hearts of the underworld. Following orders from the boss (played by Koichi Sato), he assumes the guise of ‘Akira Satou ’ alongside his partner (played by Fumino Kimura), presenting themselves as siblings. Their task is to live an ordinary life in Osaka for a year, refraining from taking any lives.

One day, he serendipitously encounters a mysterious wheelchair-bound girl (played by Yurina Hirate) and Utsubo (played by Shinichi Tsutsumi), the seemingly benevolent founder of a non-profit organization dedicated to children’s futures. These encounters trigger memories of a covert assassination mission from four years prior.

Amidst impending storms and a series of unusual events, Fable grapples with adhering to the ‘no killing’ command while safeguarding himself and those close to him.