Find the girl, have her guide you to the boy.
If you wish, enlist Jahi to help, not a high priority.
Cezar is being used as a battery in the deep confinement core of the city. He would have been useful, but do NOT attempt to free him, you will fail.
He will likely last thirty to forty years. Feel free to go back later, AFTER this assignment.
If you pass by any stores that are undefended pick me up some UNGROUND coffee. This is not a high priority, but I will give you extra credit. Light roast.
-A letter to Scrambles from the Head Master