Daredevil eleven-year-old Billie has an exciting summer, in spite of her overprotective stepfather, when she figures out where her father and uncle are hiding after robbing a bank and enlists her cousin's help in convincing them to surrender.

Lucy Bluecrowne is beginning a new life ashore with her stepmother and half brother, though she's certain the only place she'll ever belong is with her father on a ship of war as part of the crew. She doesn't care that living in a house is safer and the proper place for a twelve-year-old girl; it's boring. But then two nefarious strangers identify her little brother as the pyrotechnical prodigy they need to enact an evil plan, and it will take all...