15yr old Tim Edge is a budding graffiti artist and an expert in selfishness. When Tim and his two best friends, Vic and Alf, bunk off from a school trip at the Natural History Museum, they stumble into a Press Conference being held by Lena Eidelhorn, a mad scientist who is unveiling her latest invention, The Vitalitron. The Vitalitron is capable of predicting the time of death of any living creature, and when Tim sneaks inside, he discovers he only has 2:Hrs left to live. Chased across London by tabloid journalists Tooley and Graves, Tim and his mates agree on a bucket list that will cram a lifetime into the next two hours. Meanwhile, Lena makes plans to ensure that the Vitalitron's prophecy becomes true no matter what.