This documentary thriller brings to light real images recorded during the greatest undercover operation in an animal experimentation laboratory in the world. Carlota Saorsa, now a protected witness, sacrifices everything and puts her life on the line to show the world the harsh reality she experienced for 18 months inside what she calls "The Bunker." Carlota, after years of activism, manages to infiltrate a pharmaceutical laboratory, where she records serious irregularities that could constitute acts of animal abuse. Day after day, she deals with her ethical principles and documents animal suffering, carrying out methodical and precise work in her research, taking constant risks for her personal safety and well-being. As she becomes part of the team of technicians and gains more responsibilities, she develops a relationship with a beagle dog that is about to be euthanized, forcing her to make a crucial decision for the research. After 544 days undercover, hundreds of hours of recording
