Prolouge time! Note this chapter was edited.
I luckily don't own Ninja Turtles. It would be awful if I did.
Donnie ran to the nearest man-hole cover in order to get to the surface. However, the slight dizyness he was experiencing slowed him down. He couldn't find Michelangelo anywhere!
Master Splinter had went out with Leo and Raph for a training exercise, and even though he didn't feel well (which was the only reason he wasn't there), Splinter left Donatello in charge. After Splinter left, Donnie mostly stayed in his room or his lab, only coming out to check to see if Mikey hadn't broken anything. But when Don went to check on his younger bro for the fifth... or maybe the forth...or the sixth... Yeah! Sixth time, he couldn't find him anywhere.
As Don ran through the sewers, he worried for his little brother. He hoped that his bro hadn't been hurt, or anything, since he had never told him that he had left. But wherever Mike had gone, Donnie was sure it was the surface. Where else could he be?