Undercover Gamer

When Marie's tech-genius mentor Sterling Vance invests in an eSports tournament, 12-year-old Marie and her three best friends get the chance to compete and travel to China for the tournament. But when they arrive, they soon discover that one of the teams is cheating, and everyone is in a bad mood ... and it's not long before they find themselves acting strangely too. Can Marie discover who's plotting to bring out the worst in everyone, and stop it before it brings disastrous consequences, for the teams ... and the world?