As a renowned lifeguard struggles with his wife's suicide, his world is in shambles when he discovers that her rapist is a family member.
I would probably say, “his world turns to shambles”
Also, what must the lifeguard do when he discovers the family member is a rapist? (That is the story)
“After he discovers his deceased wife’s rapist is a close family member, a renowned lifeguard must…”
(Not sure what goes after that)
Sorry there wasn’t much to go on. Good luck with this!