 The Superfriends are in mourning for the loss of Batman at the hands of the Riddler. They reflect back on the last few days to try and figure out how this tragedy happened. The Legion of Doom has dug up an element called the Noxium Crystal. It contains all the necessary elements to destroy all of the Superfriends. Soon Wonder Woman and Superman also fall due to its deadly power. The Legion gives the remaining Superfriends just 24 hours to leave Earth forever or fall victim to the Noxium Crystal.