The toast has been made and the cake has been cut.
The most intimate wedding reception of the century has started, and all the guests are suffering a bad case of nomophobia (a.k.a. "no-mobile-phone phobia"). But things get real in a hurry when the mysterious killer sets off a frenzy that drives the re-maining guests into a world of unknown primal fear. Now they must learn to de-pend on each other if they are to survive the hunt.