Horror strikes Moominvalley when a vampire escapes from the Zoo, and everyone tries to cover himself up in gauze or bandages to keep from being bitten. Not exactly knowing exactly what sort of vampire it is, most people aslo use garlic to be on the safe side. The blood-thirsty beast is finally found, having taken refuge in the Moominhouse kitchen, and takes an immediate shine to Moominmamma, who refuses to give it up to the Zoo, that not being the way guests are treated in Moominhouse. Meanwhile, everyone is walking around in garlic an gauze, and the Moomins realize they have to do something about it. As is often the case with them, their solution is perhaps not the best one...