Jake x Izzy | Looking for answers

Jake and Izzy get into fight because of Jake inviting Marina to join the crew without talking to either of them because 'He's the Captain'. Izzy then ends up leaving pirate island and goes to hangman's tree to talk to peter. Who is making a plan to find out whee he came from. Izzy goes with him because she isn't from the adult world either. And then somehow Jake cubby and Scully end up coming along too!