Mara Maru

Mara Maru is a 1952 film directed by Gordon Douglas. It stars Errol Flynn and Ruth Roman.

Mason is arrested but is released after Steven Ranier comes forward and says he witnesses the murder. Ranier says he is a private investigator who worked for Callahan and Mason hires him to help him find Callahans killer.Ranier introduces Mason to Brock Benedict, who wants Mason to find and recover a diamondencrusted religious icon off the Philippines coast, located in a sunken PT boat on which Mason and Callahan served. He offers to split the proceeds with Mason and Stella. ........

Source: Wikipedia