After finding themselves in a new world filled with strange creatures changed into teenagers, Superman, Batman, Wonder Woman, The Flash, Cyborg, Green Lantern, and Vixen must work with their new friends, Team RWBY, to save Remnant and return home. Then, in the exciting conclusion, after successfully escaping a deadly trap, the members of the Justice League emerge in their own world to discover that Grimm, ravenous creatures from Remnant, have overtaken Earth! In order to defeat the monsters, they must call on their new friends – Team RWBY – for help!