Hooten arrives on a Caribbean Island, searching for Captain Morgan's pirate treasure. On the beach, Hooten meets Lady Alex, and is not happy. They argue, and decide to have a competition to see who can find Captain Morgan's treasure first. They each have half of the treasure map, and off they go in their separate searches.
Hooten and Alex end up in the same spot on the island. They agree to work together to find the treasure.
Hooten and Lady Alex find the treasure, but, of course, bad guys come in and steal the treasure.
They are left adrift on a raft in the middle of the Caribbean, but they are rescued by her fiance Ed.
Ed tells Alex they will be married on the beach, forgetting about the elaborate London ceremony.
Hooten and Alex find who bought the treasure: a rich couple about to set sail.
Hooten and Alex steal the treasure back and escape.
Alex is pensive about going through with the wedding, but Hooten gives her a pep talk.
Alex eventually shows up on the beach, and she marries Ed.
Hooten leaves the treasure with Lady Alex at her hotel.
The series ends a week later, with Hooten and Lady Alex in Vietnam, tied up and left for dead by bad guys: arguing, as usual.