Kate and Zoe, elite track cyclists, are facing their last and biggest race: the 2012 Olympics. Devoted and self-sacrificing Kate, more naturally gifted but hampered by the demands of her personal life, is training fiercely; whilst her eight-year-old daughter Sophie dreams of the Death Star and of battling alongside the Rebels as evil white blood cells ravage her personal galaxy. Intense, aloof Zoe has always hovered on the periphery of real human companionship, and her compulsive need to win at any cost has more than once threatened her friendship with Kate - and her own sanity. Will she allow her obsession to sever the bond they have shared for more than a decade? Each wants desperately to win gold - and each has more than a medal to lose...