Quinton needs a gypsy mudstone to open the passages to the Undersea to save his beloved mermaid, Aquaria. The Doll Queen of Vulcury has one of the magical stones, but is surrounded by enemies and covets his ship, the massive Serpent Typhoon. A deal is struck between them. Once Quinton eliminates the threat to her kingdom, she'll give him the mudstone. But as time goes on, Quinton sees the deal includes far more than he bargained for, leaving him fighting enemies from all directions as he desperately tries to protect his friends and keep the queen from claiming his ship. With time running out, he must choose between honoring his word or saving the one he loves.