Lynn Barrett is a single mother, trying to cope with life after divorce. And her life becomes an even bigger nightmare when daughter Caitlin is diagnosed with terminal liver disease. She is put on the transplant waiting list, but there is a world shortage and most patients will die while waiting. In desperation, Lynn turns to the internet and discovers an organ broker who can provide her with a liver but it will cost Lynn £250,000. To save her daughter she mortgages her home and borrows from family and friends to raise the money. A few days later the organ broker tells Lynn she has found a young woman, a perfect match for Caitlin, who is in a coma following a car smash in Italy. Meanwhile Roy Grace is working on the case of the remains of three young people recovered from the seabed off the coast of Brighton. These remains lead him to a Romanian trafficking organization of street kids from the Eastern bloc for the UK sex trade; some of them are also traded as organ donors…