An executive from a pharmaceuticals company hires the Goodies to promote an over-the-counter sedative called "Venom". The Goodies quickly succeed in their task by changing the name to "Snooze", but Graeme, thorough as ever, decides that the product can be improved by making it far more potent. Chaos ensues when Bill, a chronic sleepwalker, is chosen to be the Guinea pig for Graeme's new "Snooze" formula.