Bernie Eckstein, a young physics PhD student, is about to test the time machine he has built out of the microwave oven in his kitchen. He sets a camera to document the experiment - but it takes him some time to realize that he needs to remove the lens cover.
Bernie's flatmate, Jemima Jones, is less than thrilled about his experiments and the mess they cause in the kitchen. After the first successful test, jumping six hours into the future, the time machine short-circuits. This causes it to jump crazily and uncontrollably, carrying Bernie into the future several hours at a time. Some times Jemima is there - and other times she's absent. Jemima, angered by Bernie's 'disappearing act', tries to use the microwave oven herself and gets caught in the time-jumps too. Now Bernie and Jemima must find a way to stop fighting and stop the machine - before they go too far into the future.