Maysa Malik just can't seem to be good like her twin, Musa. So, when she isn't allowed to go on a school trip, Maysa tries to change her parents' minds by taking part in a cookie competition at the mosque. But when the cookies are all destroyed, it's up to Maysa, Musa and their neighbour, Norman, to solve the mystery. They'll have to put their detective hats on to catch the culprit - and help save Maysa's reputation.