Cosmo goes to the Aerodrome to stop the mad skywriter from creating any more aerial graffiti while Hope causes even more chaos when she poses as Charity. Meanwhile, the Lady in Red learns the true conspiracy between the Imperial Zeppelin Co. and Doctor Wu's Perpetual Inertia ship; Rhoda Helle confronts her rival; B.B. gets kidnapped by a robot; and Monty Vickers makes a surprising proposition involving the Loch Ness Monster.