Morty discovers a distinctive sword from Rick's past, the mysterious Ball Blade, and unwittingly opens a portal into a series of worlds rife with conflict. Marooned through the portal, Rick, Morty, and Jerry must navigate the worlds of conflict, discover why Rick's Ball Blade is pulling them toward an enchanting, sultry voice from his past, and protect Rick's deeply held dream from the nefarious Casteratis, who seek power through gathering Dream Balls.