April Fool's Day

During socialite Torrance Caldwell's debutante ball on April 1, 2007, millionaire Desiree Cartier dilutes a powerful drug into the champagne of her acquaintance Milan Hastings, and tapes with her camcorder as her brother Blaine Cartier takes advantage of her while her friends Torrance, Barbie and Peter Welling, Charles Lansford, and Ryan snoop. Milan has a seizure, falls off the balcony, and dies immediately. The group goes to court, Blaine loses the control of the family's fortune and it shifts to Desiree, but they are considered innocents and Milan's death is considered a fatal prank. One year later, each of them receives a letter summoning them to Milan's grave. While gathered in the cemetery, they receive a package telling that each one of them will die until the person responsible for Milan's death confesses.