Talked out of avenging his brother's death Angel heads to England, but has no idea how close he comes to the woman whose blood he is looking to spill. Barnaby, Leah and Nina are taken in for questioning at just the wrong moment.
To save their kidnapped mothers Nina and Barnaby must raise a million pounds, fast. Nigel tries to distance himself from the mess he has created but is he mad enough to think the Sherman's will allow him to flee?
Stuck in the desert with a drug lord in their car boot, Barnaby and Nina are in a real mess. The pair are even more worried when they learn that the Sherman twins have put a price on their heads.
Concerned for the safety of her family Nina moves them in with the Walkers. Barnaby is left floundering as more of Nigel's secrets are revealed. The police inch closer to the criminals that left Smith dead.
Backed into a corner by Angel, Barnaby and co must embark upon a risky mission to enter the Shermans' super-secure mansion and steal back the statues by force.
Nina and Barnaby attempt to escape from Mexico. With no money and both the drug cartel and the Sherman Brothers' own bounty hunter on their tail, they need all their cunning and wit to make it safely back to England.
Barnaby and Leah fly to Mexico to give the cartel what they were promised, but Nina has been Nina has been captured and is suddenly along for the ride too - which causes major tensions between Angel and his father.
Nina wants the reward for finding the Hitler painting, so she drugs Barnaby and takes him to the Sherman Twins. Barnaby agrees to help find the picture, so he can part company with Nina forever.
Barnaby has been taken prisoner by Colin McQueen, who is also looking for the Hitler painting. Nina and Leah work together to find the picture and free Barnaby, while keeping the Sherman Twins' bounty hunter at bay.