Just as Granny Leni is leaving to attend a parent’s evening to pay for the school trip she has a heart attack and is rushed to hospital. Max’s worst nightmares are coming true, if he looses her, he has no-one any more. It gets even worse when someone steals from Granny Leni in hospital. A thief takes not only her hard-earned money but also a valuable necklace which she only wears for special occasions. Not wanting to upset her any more, Max doesn’t call the police but starts looking for the thief with the Peppercorn team. While Emma and Henry search jeweller shops in Hamburg for the missing necklace, Max and Nina start researching in the hospital.