Complex sentence: Unbeknown to Pinocchio, they plan to hand him over to Puppetino in return for a reward, but after Pinocchio saves them from a giant barracuda, they change their minds.
Split into simpler sentences: Unbeknown to Pinocchio, they plan to hand him over to Puppetino in return for a reward. But after Pinocchio saves them from a giant barracuda, they change their minds.