The player washes up on the shores of the Igandea River near Germanium Village with no memory of who they are or how they got there. The local Pokemon researcher, Professor Cherry suggests visiting the gym leaders of nearby towns. As they are community leaders, he suggests they may recognize you. The player journeys around, meeting the gym leaders, and slowly realizing that while some people recognize them, they seem hesitant to help the player out.
The player goes on a journey of rooting out corruption as they try to discover their identity.