Original: Clank urges Ratchet to continue their quest to confront Drek, but Ratchet is obsessed with getting revenge on Qwark.
Simplified: Clank wants to stop Drek, and wants Ratchet to help him find a superhero called Captain Qwark, who he thinks will stop Drek. Clank fixes Ratchet's ship, so that Ratchet will help him.