DI Liz Kavanaugh: You realise policing internet porn is your life and your career went down the pan five years ago. But when a fetishists dies on your watch, the Rule 34 quad moves from low priority to worryingly high profile.

Anwar: As an ex-con, you'd like to think your identity fraud days are over. Especially as you've landed a legit job (through a shady mate). Although now that you're Consul for a shiny new Eastern European Republic, you've no idea what comes next.

The Toymaker: Your meds are wearing off and people are stalking you through Edinburgh's undergrowth. Buth that's OK, because as a distraction, you're project manager of a sophisticated criminal operation. But you do wonder who's killing off your potential recruits.

So how do some bizarre domestic fatalities, dodgy downloads and an international spamming network fit together? The more DI Kavanaugh learns, the less she wants to find out.