1. Cisco is a cabin boy. He’s grown up on Captain Well’s ship, almost with Frost (nicknamed for her cold attitude and the glare she’s been known to give.) She joined the crew when they were barely thirteen, and frankly Cisco has never been sure if she joined freely or if she was leveraged as part of a ransom that never got paid.
2. Now, as adults, the ship is docked in London and Frost is in more of a mood than usual. Cisco doesn’t understand it, until he joins Ralph in trying to make a score at a nobleman’s party and runs into someone who is the spitting image of Frost, except with darker hair. Caitlin.
3. Cisco chokes when he first meets Caitlin, and about two seconds later Ralph is caught stealing. The two of them are chased out of the party and Caitlin follows. It isn’t until they’re back at the ship that Cisco and Ralph realize Caitlin is still with them.
4. What Ralph was caught stealing was some of Caitlin’s jewelry, and she would like it back. Ralph refuses, Cisco pleads with him to just return it, and while the three of them are arguing Frost finds them. The whole thing spills out then that Frost ran away on the ship when it was docked in London all those years ago. She and Caitlin are twins and daughters of a nobleman. Frost wanted to escape the politics and having her life planned out for her.
5. For the next few days the ship stays in London, and Caitlin sneaks away from home to visit and try and convince her sister to return. However she ends up spending most of her time with Cisco, hearing about his adventures at sea, and when the ship leaves London she’s on board.