A man is found dead in his flat, and he's been robbed. Police trace the last man he called on his mobile phone. But when toxicology tests reveal the victim died after drinking a deadly cocktail, police are under pressure to find the evidence to prove their prime suspect is a killer. And in another case, police trying to crack open an organised drugs gang operating out of a tandoori takeaway hit the jackpot when they discover the owner is renting a warehouse in a neighbouring county.