Daniel is known as Weirdo because he enjoys doing things at school that others think strange: working out mathematical calculations and formulas for everything, doing his homework and being on his own. Tosh couldn't be more different: hanging around with his 'friends' who use him as a butt of their jokes and picking on others, such as Daniel. So when they find themselves sharing lodgings on an Outward Bound weekend neither is too happy. Then they fall into a cave whilst out orienteering and the teacher with them is knocked unconscious. Before they know it, water is pouring in on top of them! Faced with the prospect of drowning, Daniel and Tosh are forced to forget their differences, even for a short time and work together to save themselves and their teacher.