Elizabeth catches a bad cold from Verity. With a raging temperature, her power to hyperfunction and use her genius is out of control. She finds herself acting against her will, fulfilling other peoples' wishes - a cold cream for Verity, sunglasses which give Russ scientific formulae and an exo-skeleton for Garth, transforming him into an armoured warrior Garthdor. The illness worsens and Elizabeth, close to death, calls for the only person who can save her - Toby.