Ketamine has become increasingly common among young people in the UK, where its low cost and reputation as a versatile party drug can obscure the risk of serious harm. Following journalist Matt Shea through Bristol’s nightlife and free-party scene, this report explores how recreational use can progress into dependence, debilitating bladder damage, and other long-term health complications. Personal accounts, clinical explanations, and conversations with people involved in the drug trade reveal why ketamine has become so firmly associated with a generation—and why its growing popularity is raising urgent public health concerns.