Sarah Jane, Clyde, and Rani go to a shop to investigate a possible alien sighting they saw in a newspaper clipping. There they meet the Shopkeeper and his parrot, which he calls Captain. The Shopkeeper put that article in the paper to bring Sarah Jane and her friends to the shop. He tells them that they must go to three different time periods to retrieve three objects made of a metal called chronosteel. Chronosteel is a metal forged in the Time Vortex and has the power to alter history, which would cause the whole planet to be sucked into the vortex. Once the three pieces of chronosteel are brought into the same time period, the danger passes. However, they must bring the chronosteel into the present in a certain period of time. He sends the three of them through a "time window" without wa