Will adored his grandmother Gertie. But he could not even imagine that she was hiding a HUGE SECRET from everyone! An ordinary-looking old lady, she was... the leader of a secret knitting club, whose members have magic!

It turns out that all the things that grandma knitted for her relatives, have enormous magical powers! And now they are being hunted by a mysterious stranger who recently arrived in the city. Who is he? Why does he want grandma's sweaters? Was he planning something dangerous? Will has to find out! But first he'll have to make friends with Grandma's friends and learn incredible new secrets!

A warm story about magic, the power of family and the coolest grandmothers in the world! Illustrations by Teemu Juhani.