以传奇杀手坂本太郎为主角，金盆洗手的他与亲爱的家人平静度日，没想到有刺客接连来袭，幸福家庭生活恐将好景不常。这下子坂本太郎必须与伙伴联手，守护他的幸福日常。
Following the events of the holiday film Merry Little Batman, Bat-Family follows Batman, Alfred, and young Damian Wayne—who has taken on the mantle of Little Batman—alongside a few newcomers to Wayne Manor, as they navigate the fun and frustrations of life as a super family.
