[REC] 3: Genesis

Koldo and Clara are about to celebrate their wedding day and have gathered their friends and family in a sumptuous country house for the occasion. That evening, a veterinarian recently bitten by a dog develops abnormal behavior and becomes aggressive. In a few moments, an uncontrollable wave of violence sweeps over the party as an increasing number of guests are infected as a result of bites. Clara and Koldo are separated amidst the chaos. Koldo finds refuge in the kitchen with his cousin Adrián, Clara's sister Tita, the wedding photographer Atun and a copyright inspector nicknamed "Royalties". They escape through the air-conditioning ducts, apart from Atun due to his size. Outside, the group finds a police vehicle and a guest eating the policeman's flesh. After killing her, they try to contact the police, but Royalties is devoured by the now-infected policeman. The vehicle's sirens are triggered and alert the infected. The group escapes and joins other survivors within a chapel, which the infected cannot enter. Through the P.A. system, Koldo hears Clara say that she is safe as well as pregnant, and he decides to find her.