When former child soldier Baba rescues Freddy from a sexual assault, something dark is ignited in them; DS Lola Franks and DI Jackson Mendy investigate the murder of the pair's first victim.
Lola and Jackson find one thing they can agree on after interviewing Freddy; Freddy and Baba seize upon an opportunity to solve two problems with another killing.
Freddy and Baba flee the city with victim number three in the boot of the car; Jackson and Lola make a breakthrough over a cup of green tea.
It looks like Baba and Freddy got away with murder, and they celebrate with a trip to Freddy's old school; Lola and Jackson wander around in search of a stick.
Freddy and Baba don Halloween masks to gain entry to her old school; Jackson and Lola find evidence that links them to the third victim.
It looks like the end of the road for Freddy and Baba, now trapped by Lola and Jackson. With the trail behind them strewn with bodies, surely they can't escape the reckoning.
Hermione Corfield
Freddy
Dipo Ola
Baba
Eve Myles
DS Lola Franks
Babou Ceesay
DI Jackson Mendy
Vicki Pepperdine
DSI Susan Smart
