When her family moves into a new house, Kat finds a sponge which appears to be alive, but no-one will believe her. After the discovery, the family is besieged by bad luck, and Kat is convinced the sponge is behind it.
Amy thinks her father has bought her the perfect gift: a new ventriloquist's dummy. However, it soon becomes apparent that there is more to this dummy than meets the eye.
