Hårlung and Møller. These two master detectives embark on an expedition to St. Thomas—but neither the journey nor the surprising stay will be without heated conflicts. On their way to the island, they meet a lovely young lady who has inherited a house on the island—and who has various shady lawyers and bandits on her tail. On their way to the island, they meet a lovely young lady who has inherited a house on the island - and who has various shady lawyers and bandits hot on her heels. The two super detectives are really put to the test.