After six months at sea on a solo trip around the world, Georgia Perry's 44-foot saiil boat sits idle with no wind in her sails for several days. Cabin fever sets in and the border between fact and fantasy begins to trickle away. Are uninvited visitors bordering the vessel, or is her mind deceiving her? But if these are just tricks in her imagination, how do these ghostly encounters leave Georgia with bruises? If the visitors are real, is there a bigger danger?