A few years be fore he we nt on to make a big sp lash in t he cannibal  sub-gen re, Rugger o Deoda to directed this suc cessful rip-off of Ro man Polanski&# 039;s b rilliant Knife in the W ater. Naturally , being an Italian fi lm - there&# 039;s more of  a focus  on sex  than the  relatio nship betw een the c entral co uples, b ut the claus trophobic atmos phere and en tertaining char acters he lp to keep th e tension.. . (展开全部) A few years b efore he went o n to make a big splash  in the can nibal sub-g enre, Rugg ero Deodato d irected  this succes sful ri p-off of Rom an Polan ski's br illiant K nife in the  Water. Natur ally, bein g an Italian film - the re's mor e of a fo cus on sex  than the rela tionship betw een the ce ntral co uples,  but the c laustrop hobic atm osphere and ente rtaining charac ters help to ke ep the tensi on bubb ling over,  which ensures that the movie is inter esting for  the duration. T he film doe sn&#039 ;t have near ly as much &#03 9;bite& #039; a s Cannibal  Holocaus t and most of the rest of Ruggero D eodato's f ilmography, but i t's obviou s that  even with t his early fi lm; Deodato i s a dire ctor with  the poten tial to  make a mar k on cin ema. The plo t is si mple in that i t just fo cuses on  two coupl es. George and Silvia  invite Ire m and Barbara  for a weekend c ruise on  their yacht.  It soon tr anspires that  George isn&#0 39;t the m ost sensitive  man to ever li ve, and Silv ia doesn&#0 39;t seem to  mind hi m treating her bad ly. The situ ation e scalates, a nd Irem an d Barbara join  forces with  Silvia for ve ngeance  against  George.. .and three wa y sex, o f course.A fe w years be fore he went on to mak e a big sp lash in th e cannibal  sub-genre , Ruggero Deo dato direct