In June 2004, two traffic officers in the Civil Guard stopped a driver in a Suzuki in Castejón, Navarre, and were gunned down. The perpetrator vanished without a trace. A race against time began to find him. The bullets from the submachine gun would prove crucial in linking the killer to a bank robber known as ‘El Solitario' (The Loner).

The Civil Guard and the National Police are still on the trail of the most wanted robber in recent times. For 14 years, nothing and no one has been able to catch him, but now they have his name and are preparing a plan to capture him. In his latest robberies, he has changed his appearance, uses a crutch, and is even more violent. The investigation is leading them to Portugal. They need to catch him in the act.