A maximum security prison.

Hell behind barbed wire.

A strict hierarchy of criminal “authorities” reigns here and the laws of the underworld rule.

It is impossible to survive here alone.

But an undercover agent - police officer Dan Shepherd, nicknamed the Spider - intends to do the impossible - to unravel the case of a series of brutal murders among drug dealers. And for this he must become one of the prisoners. The game begins.

But even the Spider does not know how dangerous she is - after all, the power of the man he is hunting for extends far beyond the walls of the prison!