After awaking from a nightmare in which he failed himself and his comrades in a battle against Shredder, Leonardo feels that he is unfit as a leader and, donning civilian clothes, decides to leave the Lair and the Turtles. Meanwhile, Shredder and Krang have left the Technodrome and are on the top floor of the Mile High Tower, executing Shredder's new scheme for world domination. This time out, he has created a Solar Siphon and by aiming it at the sun, he can effectively drain the sun's 'power/energy' and store it in compact batteries while the Earth slowly goes into a deep freeze. Everyone will be too cold to resist him. (thetvdb.com)