Whentheirmotherishospitalizedinacaraccident, PimandPuttsuddenlydiscoverthattheyhaveasetofgrandparentsthey'veneverknownabout.Butaterrifyingtruthhaslongbeenhiddenwithinthewallsoftheirgrandparents’house, atruththatgraduallyrevealsitselftoPimandPuttthroughamysticalhole, unleashinghair-raisinghorroronthe...