Meet Matildas star goalkeeper Mackenzie Arnold as a kid and follow her football and friendship adventures. Macca is in year 6 and loving life. She has moved from fullback to goalkeeper for her beloved Seaport Strikers, and she still loves to skate and hang out with her mates - she's always up for a kick-around in the park and a good-natured prank. But when Macca is goaded into accepting a bet with a kid in her class who thinks she can't hold a clean sheet against the Strikers' strongest competitors in the biggest game of the season, can she come through? A new friend and teammate from Argentina adds some added skill to the team, but not everyone is happy. How can Macca bring together the team and stop the ball getting past her?