Caught Inside (2010)

Surfing charters are meant to be a trip to Paradise. With six male surfers stuck on a boat, there's bound to be some friction. When two of the surf crew are replaced at the last minute with girls - the heat is turned way up. The one single girl on board - SAM - enjoys the attention. She has Bull and Rob wrapped around her finger. The frustrated, psychotic, Bull soon decides, "she'll get what she's asking for" and molests her. Outraged, the others abandon him on an island, but the ever-determined Bull returns, and takes control of the boat. He attacks the crew and holds them hostage. He harasses Sam and tortures the others. It's a nightmare battle of wits, on board the yacht, as the four imprisoned friends must survive the fury of the psycho at the helm.