Death/Site

We live in a simulation.
Death/site, a death prediction app, lets you hack into the simulation and get away, if you wish, with murder.
It was planned for weeks, but when Alice committed suicide, they--Jane, Frida, and John--had second thoughts about spending the March Break week without her at a rented cottage.
Going through with their plan, one of their friends is murdered.
Knowing it was Death/site and knowing who was behind it, John sets out on a path of blood lust and revenge, where no one, not even his dear friends, are safe.