Talented ten-year-olds Emily, Bella, Chloe and Grace are sick of people treating them like helpless princesses.

Science star Chloe Karalis's favourite person in the universe is her grandmother - so she's thrilled when Yiayia comes along for a fab summer holiday with Chloe and her three besties. But when Yiayia goes missing on her daily walk, the foursome know that they're faced with their biggest mission yet. Can they combine their unique talents to rescue their beloved mentor?