Gemma is expecting Captain Sinker back from her holidays, so she is surprised to find Captain Captain there instead. The Captain produces a message in a bottle direct from Captain Sinker explaining that Sinker is not coming back and has officially handed over command of the Scarlet Squid to Captain Captain. When Cook and Line read the rest of the message, they discover that Captain Sinker has been given a new ship, the Crimson Catfish - one that actually floats and sails on the sea. Captain Sinker has decided to go off on some new adventures and, what's more, she is inviting Cook and Line to join her. The thought of life on the open sea, with treasure hunts and definitely no slop, is too much to resist so Cook and Line head off to pack. But later they start to worry that they are making a mistake by leaving - they will miss life on the Scarlet Squid, playing fun games with all the Swashbucklers.

Captain Captain is in a grumpy mood because she hasn't had her pre-game feast. She calls on Cook and Line to feed her, at which point they proudly present her with some of Cook's disgusting seaweed porridge. Captain Captain orders him to make something else, something delicious. Later on, Cook reveals his new dish: seaweed super soup. Captain Captain is doubtful of cold seaweed soup, but once she tries it she realises that it is the most delicious thing she has ever tasted. It's so good, she wants Cook to make some more so she can sell it to other pirates and get rich. A huge list of her pirate friends send in orders for the delicious soup. Cook's new batch is almost ready and he has only one final ingredient to add, seaweed. Unfortunately, there is not a single piece of seaweed left on the whole island. How can they make seaweed super soup without seaweed?