A potent new drug has hit the streets of Kinloch, and DCI Daley and Scott are struggling to catch the notorious gang behind this evil trade.

After a party of Oxford students arrives in town for a camping trip before a Himalayan expedition, one of the group seeks out an illegal high and is violently assaulted. However, these students are well connected, and this brings further unexpected problems for Daley. Ultimately, he and Scott will discover crimes as disturbing in nature as anything they have ever confronted.