Murder on the playground

A young woman in a white frilly dress is found dead by a slide in the playground. Her hair is in a ponytail and she looks like a schoolgirl. On examination, forensic doctor Julia Schwarz discovers that a broken arrow is lodged in her heart. But there's no blood anywhere.

The investigation gains momentum when another dead woman is discovered in a playground in the neighbourhood, again with braids and wearing the same clothes. Turns out the girls had something else in common – both struggled with addiction. It's clear the same perpetrator is responsible. Will he keep killing?