Super-Villains Heatwave And Captain Cold Don't Like The Flash, But They Don't Like Each Other Either! They Face Off In A Climate-Changing Smackdown That Could Spell Disaster For Earth's Ecosystems. The Flash Tries To Take The Foes One-On One, But Ends Up Encased In Arctic Ice. Unable To Move, Flash Watches As Heatwave Turns Up The Threat Level By Melting The Frozen Seabed . . . A Sea Full Of Explosive Methane Gas!