▁in ▁his ▁a partment , ▁which ▁is ▁position ed ▁at ▁his ▁window , ▁allowing ▁him ▁to ▁sp y ▁on ▁his ▁neighb ors ▁( in ▁a ▁R ear ▁Window - es que ▁way ). ▁However , ▁he ▁witness es ▁a ▁man ▁visit ing ▁Mac ' s ▁neighbor ▁Kevin ▁Scott , ▁who ▁is ▁a ▁former ▁university ▁professor . ▁H ours ▁later , ▁the ▁man ▁is ▁found ▁dead . ▁Later , ▁Mac ▁sees ▁him ▁poison ing ▁his ▁can ary ▁until ▁he ▁is ▁interrupted ▁by ▁a ▁visitor , ▁unexpected ly ▁to ▁be ▁P ey ton , ▁Mac ' s ▁ex - g irl friend ▁whom ▁he ▁hasn ' t ▁seen ▁for ▁over ▁three ▁years ▁since ▁his ▁visit ▁to ▁London ▁with ▁her . ▁He ▁tries ▁to ▁conv ince ▁her ▁that ▁Kevin ▁is ▁behav ing ▁susp ici ously ▁and ▁that ▁he ▁killed ▁his ▁can ary , ▁but ▁she ▁thinks ▁he ▁is ▁je alous ▁and ▁tells ▁him ▁that ▁Kevin ▁is ▁just ▁her ▁friend . ▁They ▁talk ▁about ▁the ▁past ▁and ▁they ▁re kind le ▁their ▁relationship . ▁Mac ▁tells ▁her ▁that ▁he ▁missed ▁her ▁after ▁she ▁left ▁him ▁for ▁her ▁family , ▁to ▁which ▁she ▁apolog ises , ▁but ▁he ▁understood ▁that ▁her ▁family ▁is ▁more ▁important . ▁Kevin ' s ▁actions ▁are ▁proved ▁to ▁be ▁criminal ▁when ▁he ▁pl otted ▁to ▁expose ▁a ▁group ▁of ▁people ▁to ▁a ▁highly ▁cont ag ious ▁chemical ▁subst ance ▁and ▁he ▁is ▁arrested . ▁Before ▁the ▁cred its , ▁Mac ▁and ▁P ey ton ▁look ▁out ▁of ▁his ▁a partment ▁window ▁am using