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Having met on a train, a smooth-talking psychotic socialite shares his theory on how two complete strangers can get away with murder to an amateur tennis player — a theory he plans to test out.
A bleak mansion sits ominously on a cliff above the sea somewhere on Florida's east coast. In its shadows, two people meet: a scientist haunted by incurable illness and a beautiful woman haunted by the voice of her dead husband.
Beach party escapade features a bookworm with glasses who learns to "groove", as she attempts to sing "Ready to Groove."
