Jonathan, a well-fed ship's cook, and his friend Michael go ashore in an oriental port city after a long sea voyage. They cannot resist the lure of an enticing drug den, where they are mercilessly plied with drink and robbed. They find refuge with the wealthy passenger Hieronymus Walden, who is staying at a luxury hotel. However, the two Bavarians must agree to rescue his granddaughter Kathi, who has disappeared into an oriental harem.