After Rainsford jumps off the cliff, he swims to Zaroff's Palatial Chateau. He then hides in Zaroffs room and and waits for Zaroff to come. Rainsford stood behind a curtain to stay mostly out if sight.
Zaroff walks into the room to see Rainsford standing there with a knife waiting for him. Zaroff was very suprised to see him there. They have a conversation to see who won.
Zaroff admits defeat to Rainsford and Rainsford kills Zaroff with a knife. Rainsford then sleeps in his bed that night after the hunt. He never slept better .