She felt light, happy, free - ketamine always provided an easy high. 'Wings' Ng Wing-yin was only 10 when she first tried ketamine, a commercially manufactured anaesthetic that has replaced heroine as Hong Kong's most heavily abused drug.
Ketamine made her feel really good. It relieved her, briefly, from the loneliness she felt at home, where her working parents had little time to spend with her.
Wings' friends, who were a few years older, kept her supplied with the drug.
Although Wings hated how tired ketamine left her, she liked the highs too much to stop. When she was 12, Wings admitted to a family friend that she was using it.
Her family took swift action, transferring her to Christian Zheng Sheng College, a rehabilitation school and home for youth, where she was forced to cut ties with her drug friends.
When she saw the result of her brain scan - which showed a small, dark hole had formed at the base of her brain - she was alarmed.
