The Case Lasa and Zabala was the first terrorist act carried out by the Anti-Terrorist Liberation Groups (GAL).

In October 1983, members of ETA Lasa and Zabala disappear in Bayonne. Twelve years later, their bodies, tortured and buried in quicklime by the GAL (Anti-Terrorist Liberation Groups) are identified. Then begins a process in which the lawyer for the two families (Unax Ugalde) and his assistant try to justice and that the murderers sit on the dock.