Kathy Bardy's natural talent for tennis is discovered by a tennis coach who is determined to turn Kathy into a championship player. Winning means everything to the coach, who drives Kathy mercilessly through training.
Kathy dreams of Wimbledon and practices rigorously with this goal in mind.
She does well in competition and is ranked number twelve in the fourteen and under age group, but competing places a strain on her family and their finances, as well as on Kathy. The mysterious drowning death of one of Kathy's opponents forces Kathy to examine the cost of winning when she realizes that she, her family, and everyone who cares about her are under investigation for murder. A surprise ending leaves the reader wanting more.