Morten is excited. Today, his borrowed grandma is coming for the first time. She is supposed to do something with him when his parents don't have time. When she stands at the door, he is surprised. She looks pretty cool and doesn't waste any time. Soon, Morten is sitting on the back seat of her fun bicycle, and off they go at full speed to their first adventure. Morten, who wants to be called Mo from now on, doesn't get bored, and he looks forward to exciting outings and real adventures with Om, who doesn't want to be called Grandma. That would be way too normal! A fun read-aloud book featuring an unusual duo and plenty of adventures.