Smell of dead body 😑

My sister just rented her first house. She was coming out of a domestic violence shelter and has horrible credit so took the first house she was accepted for despite it having a horrible smell.

Welllll tonight my husband and I went to help her start cleaning and the neighbors came over and told us that an elderly lady died in there a couple months ago and wasn’t found for two weeks. Now the smell makes sense.

What do we do to get the smell out? It’s concrete floors, and you can’t see any evidence of anything… it just smells so so bad.