The Third Catrin Sayer Mystery. A second-year student at Falmouth University in Cornwall receives a shocking image 'hacked' into her Facebook page; one of her being viciously assaulted at knife-point. Although she is mainly clothed in the image, she realizes later that it is probably derived from a session where she was nude, modelling for a figure-drawing class at a nearby college, despite the rule that no cameras are allowed in the studio. Worked into the image, partially buried, is a vase but no-one understands its significance.

Detective Sergeant Catrin Sayer with the Art Crime Unit at New Scotland Yard is asked to help, based on her experience as an artist rather than as a formal member of the investigation team. She finds herself drawn further into the strange case with the appearance of a second image of the student hacked into the website of the Tate Art Gallery.