Meet Piotr, Minnie, Andrew, Flora and Sylvia - true friends and even better mystery-solvers! Hollywood sensation, Betty Massino, has come to star in the theatre down the road and Piotr and his friends Andrew and Minnie couldn't be more excited! But when the famous actress's hugely expensive diamond necklace goes missing, Piotr's dad, a security guard at the theatre, is a prime suspect. Soon, Piotr faces the very real threat of being sent 'home' to Poland.