Midsummer, and in an unassuming house on a quiet residential street on the edge of Brockwell Park in south London, a husband and wife are discovered, imprisoned in their own home. Badly dehydrated, they've been bound and beaten, and the husband is close to death. But worse is to come: their young son is missing. When Dl Jack Caffery of the Met's AMIT squad is called in to investigate, the simil...