Chasing Shadows

Serial killer Leonard Vance, incarcerated in a psychiatric hospital, is a new suspect when Sean spots a connection with the killer's two victims.

Abrasive DS Stone's criticism of police handling in a recent case leads to his being demoted to a secondment to Missing Persons with motherly divorcee Ruth Hattersley. When 16-year old Taylor Davis goes missing, though she is a known runaway, Stone is convinced that she is in danger and discovers that she had joined a website for suicidal teen-agers, two of whom had recently died in suspicious circumstances.