What Really Happened Last Summer?

16 year old Kelsey Montgomery, Madison Bales, and Sophie Pandora have been friends since they were the age of 4. There friendship has grown over the years until there bonded the closest they could get. What they saw during that summer they will never forget. Only they know what really happened last summer. How long can they keep the secret? Or will the person forcing them to keep quiet decide they wanna hurt one of the girls?