The Hardys came to Nantucket to visit Callie, who's interning at a local newspaper. But Callie's friend Alicia Geovanis and Alicia's father, the curator of the Nantucket shipping museum, are grabbing all the headlines. First, the museum is vandalized. Then Mr. Geovanis is kidnapped!

But the disappearance is only the tip of a Titanic mystery. The ghost of the Ebony Pearl, shipwrecked some forty years ago, has risen from the bottom of the sea to haunt Nantucket once again. For the Hardys, it's full speed ahead as they search for the dark secret of the Ebony Pearl...Before it claims one final victim: Alicia's father!