Daniel is known as Weirdo because he enjoys doing things at school that others think strange: working out mathematical calculations & formulas for everything doing his homework & being on his own. Tosh couldn't be more different: hanging around with his 'friends' who use him as a butt of their jokes & 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 & 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 & Tosh are forced to forget their differences even for a short time & work together to save themselves & their teacher.