Dr. Stowel made a big mistake: experimenting with unverified theories of time travel. The consequence was his sudden departure from Earth and his introduction to a sentient alien race. When he returns, many years later, he doesn't know how he got back, or why. Injured and suffering from severe memory loss, Stowel can only speculate that the aliens were responsible, that they are on Earth now and that they are up to no good. To the agents of the Temporal Exploration and Advancement project, Stowel's return could mean advancing their research by years. Yet with the risk of instigating an alien...