The story begins in 2011 and follows Josuke Higashikata, a young man afflicted by retrograde amnesia, in his search to uncover his identity in Morioh Town, a coastal Japanese town affected by the Tohoku earthquake. However, his digging pulls him and his adoptive family into the unfinished business between his previous life and an impending inhuman threat. JoJolion represents the second part of the series set in the Steel Ball Run Universe.