Whitney /`:*/C: ameronn (Cot!:ten), a man =`wi*th a strong affec[(tio.?n for +his ^%sis?te#,$r-in-law
:(P.!et-.;e [rs). When_ ! [^one of her* stepch%+ildren di*+es,* it's rev.? (ealed that th%.$e child wa%s poiso\;`ned to death. Whitney suspects his;#] sister-in-law com#mitted the+  mur@ :)der and is[^% af+ra!i^ ?d tha)[t #/;her other  ?son] may be/@$ in da`%:nger. The film cli^-maxes  during an oce:an vo(%\yage aboard.@ -`:#a cruise ship.