Voyage to Agatis (2010)

Enticed by the wealthy and dysfunctional couple of the middle-aged pervert, Rafael, and his much younger wife, Isabell, the innocent prostitute, Lisa, agrees to follow them on a yachting cruise under the sun. But, as the three holidaymakers enjoy their seemingly dreamy vacation, dangerous sexual games will gradually uncover the couple's ugly and murderous side. Now, poor Lisa is their helpless prisoner, humiliated, and, above all, violated. Nevertheless, is this the end of her nightmarish ordeal?