Presented as a story to a group of students by their teacher Lena in a field in the distant future, "The Last Mimzy" is the story of the attempt by humans in the distant future to avert a catastrophic ecological disaster that has destroyed their world. Humanity has become "isolated and warlike," and one scientist is desperately working to save the earth and its people. A small assortment of High-tech devices disguised as toys are sent by him back in time, where they are found by Noah (Chris O'Neil) and Emma (Rhiannon Leigh Wryn) Wilder, children living in early-21st-century Seattle. The "toys" are initially incomprehensible to them, except for what appears to be a stuffed rabbit. Sensing the paranormal strangeness of the devices, the children initially keep their discovery secret from their parents.