Regan’s flying squad falls under suspicion after they apprehend a gang of hijackers, but a bag with 35,000 pounds in it has somehow disappeared.

Regan clashes with an arrogant police superintendent when a crime kingpin is allowed to leave the country and go to France.

After a high-powered lawyer gets three petty thugs off on a murder charge, Regan is authorized to use whatever means necessary to bring the hoodlums in.

When seedy informant Harry Fuller is spotted by Regan in a pub flush with money, he knows something is up and interrogates Harry.

When a gang hijack an armoured security truck, Regan, Carter and the Flying Squad set up an ambush to catch the crooks. But who's the informer ?