一封没署名的遗书、一群看似无恙的学生，让中学老师郑Sir想起充满暴力与遗憾的童年往事。他亦面对妻子离别、父亲病危，同时必须找出企图轻生的同学，阻止悲剧重现。
In New York City, potent strands of bath salts have surfaced and have attracted the most devoted bath salt junkies. A young aspiring chemist has developed an even stronger batch... but something has gone horribly wrong.
