Welcome to a school reunion you won't forget 

FRENCH RIVIERA, WINTER 1992
On a freezing night, as her high school campus is engulfed by a snowstorm, 19-year-old Vinca Rockwell runs away with Alexis, her philosophy teacher.
No one will ever see them again.

FRENCH RIVIERA, SPRING 2017
Formerly inseparable, Thomas, Maxime and Fanny - Vinca's best friends - have not spoken in twenty-five years. But when they receive an invitation to their school reunion, they know they must go back one final time.
Because there is a body buried in that school... 
...and they're the ones who put it there.