Berlin. Four friends. One extreme idea. One of the most gripping thrillers ever written. Kris Tamara Wolf & Frauke set up an agency called Sorry. An agency to right wrongs. Unfair dismissals the wrongly accused: everyone has a price & Sorry will find out what it is. Its as simple as that. What they hadnt counted on was their next client being a cold-hearted killer. But who is the killer & why has he killed? Someone is mocking them & hell is only just beginning.