The GangStars of Bracelet Bay, with their motto “to do good”, are visiting Oystermouth Castle in Mumbles for the annual Mumbles music festival.  Alina, the white ghost of the castle, keeps a very eager eye on the two naughty Toms, who are also attending the fayre.  Meanwhile, Will takes a nasty fall and is rushed to hospital by ambulance.  Also in hospital is Betsy, the two Toms’ poorly great-aunt, who—to their astonishment—is visited by Loki, the vampire child.  Seal discovers his great-aunt, kind Kitty, a hospital cleaner, is in a great deal of trouble with Ali, the owner of the local supermarket.  Seal’s granddad, the Good Samaritan, comes to her rescue.