Thirteen-year-old twins Aiden and Ava and their good friend Daniel, all avid soccer players, have just learned their county league soccer trophy mysteriously disappeared forty years ago from the town library. It was never recovered. So between games and practices for the town's soccer championships, the three friends try to solve the case.

But will these amateur detectives be able to unravel the mystery and find someone who had both motive and opportunity to commit the crime? Will their teams make it all the way to the championships?

In this story, Bowen tackles important topics like equal recognition for women in sports. The afterword provides more information about the real-life disappearance of the original World Cup trophy.