The English police fight against a well-organized terrorist gang and infiltrate it with a planted informant—a certain Corridon. Corridon is a former army officer who never found his place in life. He doesn’t disdain deception; he sinks into fraud, has a bad reputation—and that is exactly why the gang accepts him as “one of their own.” Against the backdrop of unfolding events, the author, with his characteristic psychological depth, shows the drama of this man and its roots.