A charity cruise filled withGOTHAM'S wealthiest citizens has been boarded by not one but two groups of hijackers POISON IVYandMR. FREEZE fight for the right to ransom the passengers with countless citizens caught in the crossfire. Outnumbered and out of his element, BATMAN will have to find a way to play one group of crooks against the other, or they ll all go down with the ship."