The Coast Guard rescue ship “Shamrock” has been dispatched in response to a distress call from the dive boat “Sand Flea,” operated by “See Cetacean Tours:; a “dolphin encounter” tour company operating out of Savannah, Georgia. However, instead of a dive boat in distress, the Shamrock finds itself in a dire situation. One that simply sending out another distress signal may not get them out of. Can the unprepared crew of the Shamrock survive an Open Ocean Encounter?