There is a serial killer at large. Using weapons that leave no trace behind, the murderer is killing women who have only one thing in common: they share the same name, Emily Wonder.

When another Emily Wonder vanishes, Luke and Malc race back to London to save her from the murderer's plans - and from the tsunami that threatens to engulf the city...

Imagine a place where technology rules... where London is a slum and the North is a cultural capital... where from the age of five, The Authorities decide your future.

In this fascinating parallel world, quick-thinking Luke Harding is the youngest Forensic Investigator ever, aged just 16.

Luke and his right-hand robot, Malc, make a top team.

Together, they have the talent to crack any crime - and a good joke, too.

Two people called Emily Wonder have been murdered within the space of six months.

The Authorities put Luke and Malc on the case. EW1 was poisoned and EW2 was stabbed but the weapon left no forensic traces at all.

Luke interviews the famous opera singer Emily Wonder and her slightly odd PA Barbara Backley.

A third Emily is murdered in a nursing home. Luke interviews the home's staff.His request for all 43 Emily Wonders in Britain to be bodyguarded is refused.

He interviews other Emilys including a girl with a fatal wasting condition.

Luke goes ice skating, falls over and has a moment of realisation.

EW2 was murdered with an icicle. Luke discovers this is a unique murder but finds an article on the internet discussing it.

He talks to its author Tina Stone. Malc notifies Luke that another Emily Wonder - a young runaway from London - has gone missing without trace.

Luke visits his contact Owen Goode in Greenwich. London is on tsunami alert. Owen knows the young Emily and they search warehouses where she used to hang out.

Malc detects a rare type of detergent in the warehouse that he also detected on wasting-condition Emily's shoes.

Still unable to find Emily, they race back North to wasting Emily who confesses and tells themwhere young Emily is.

She serial murdered because she was bitter about her condition.

Luke and Malc race back to London as the tsunami nears and resuces her just in time.