Arthur Green witnessed something crazy early one morning. A flash of emerald light, and then it appeared: a tattered old pirate ship, rocking in the waves...a ghost ship. Gathering his courage and with his best friend Riley, they set out to explore the haunted vessel that's rumored to appear only once every ten years. So Arthur and Riley do. But the ghost ship isn't everything they expected. Because the ghost ship didn't return for no reason... ...it returned for them.