Mystery Of The Sea- Lark

When Jack Holden salvages an abandoned sailboat, the Sea-Lark, he sets up a ferry business. But strange events start happening that threaten his new enterprise. First, shadowy figures sneak aboard late at night, trying to steal something. Then Jack catches another prowler red-handed and a struggle ensues. After that, two shady men hire the Sea-Lark for a sail but turn on Jack and his friend Rodney...