14-year-old twins, Kaine and Roxy, used to be close, but now they can hardly bear to be in the same room.

Roxy hates the way her brother behaves - Kaine might be brilliant at football but he's always in trouble and cares nothing about his family. And Kaine despises the way his supposedly-perfect sister, dominates their parents in her ambition to reach Wimbledon.

But the twins are both hiding dangerous secrets of their own, secrets that could destroy everything they are working towards - and both Roxy and Kaine's survival hangs precariously in the balance.