Smugglers' Cove (1948)

When Slip mistakenly believes he has inherited an old Long Island estate, he and the gang go to see what their new "home" looks like. Unbeknownst to them, the real owners of the estate have hired a caretaker to run it in their absence, and the caretaker, running a smuggling operation, determines to get rid of the boys before they can expose his activities.