Emma is trying to get a truck out of some water which it has fallen into, Paula is helping her. The truck falls on Emma's arm and she is trapped with her arm under the water. Paula calls the base for help. David and Geoff arrive there, but they are having problems getting her out, at one point David suggests they might have to amputate her arm. The water is rising and unless they act quickly Emma will drown. With the help of Mr Baxter they just get Emma out in time.