When Eilish Main received the phone call one February evening she froze. Her 14-year-old boy, who loved skateboarding, football and plugging himself into his headphones, had collapsed in Edinburgh’s leafy Meadows district.

He was locked down in a medically induced coma, his life on the line.

One minute he was asking, “What’s for dinner?” and for a lift to town, the next, lifeless in a hospital bed, kept alive by tubes and drips after a dangerous overdose of drugs he wasn’t streetwise enough to question.

It was the stuff of nightmares, but for Eilish and husband Neil, it was not over. This naive act of teenage experimentation was to all but destroy their family. Because the drugs their son — and his younger brother following