A dozen masked individuals ransack a pharmaceutical laboratory and release the animals used as test subjects. The operation is claimed by the Animal Liberation Front. Cédric, a police officer, sets out to track down the mysterious group. That same evening, he seduces Estelle, a young veterinarian who, a few hours later, participates in an animal rights demonstration. She then comes face to face with Cédric, who has come to arrest the activists. Meanwhile, Ghislain, an employee at an industrial pig farm, acts as an informant for the commando's next operation at his company.