Milan's elite anti-terrorism police, DIGOS (Divisione Investigazioni Generali e Operazioni Speciali), receives a tip that a sleeper cell of Muslim terrorists have received toxic chemicals from Pakistan to make deadly sarin gas. The cell leader has access to Milan's centers of finance, technology, commerce -- all high profile targets with potentially hundreds of casualties in a terrorist attack. Police forces all over the world -- and especially in Europe -- are being challenged by terrorist groups recruited in the Middle East by radical forces intent on destroying Western governments and cultures. Bombings and armed assaults on innocent civilians in France and Belgium are the latest and most deadly attacks since 9/11. Italy is at the center of the attempts in Europe to neutralize this threat with sophisticated police techniques. No One Sleeps is the fictionalization of an attempt by a cell of radical Muslims intent on attacking an important Italian cultural institution in Milan and killing hundreds of innocent Italians. When DIGOS, the Italian anti-terrorism police, learns about the terrorist cell, they send agents to discover who they are and stop them before they act.