Matilda loves visiting her cousin Emily's farm with her friends. Especially down by the creek with the cute frogs. One day, Emily and her mum find an old tin. It contains a leather pouch and a beautiful Chinese comb. But where did it come from? The girls uncover even more surprises when a naughty froglet stows away in Matilda's jacket and escapes. Now there's a mystery to solve and a frog to find! Can the girls figure it out and set things right again?