In an accidental landing, the Doctor finds himself privy to a less-than-cordial welcome party at the hands of the crew on a ship he never intended to board, the Serenity. Yet, he finds here too, there is something, moreover, someone of interest to him, in the form of a girl who knows impossible things.
It's been three years since the events of Miranda, and the crew of the Firefly class ship, Serenity, are attempting to lay low on the furthest edges of the 'verse. Food and fuel are running low and they are hoping that answering a distress call will yield some much needed supplies. Instead they find themselves lost in a world long past with a mad man with a box.
The crew of Serenity is flying around the Outer Rim when they come across a rift in time and space. Nearly 60,000 years later, the Doctor and Rose Tyler stumble across the same rift. When the rift pulls both of their ships into itself, it spits them all out, scattering them in time and space. These people who've never met must now work together to get home. Firefly/DW crossover.
With bellies finally full and no one around to chase them, for now, the crew of the Serenity are surprised by their close encounter with a strange blue box floating in space, the man inside it calling himself a Doctor and his beautiful companion. M for swearing in Chinese.
A deadly virus has turned Beaumonde into a Reaver infested paradise. The Doctor, Amy, and Rory seek the help of the crew of the Serenity in order to save the people of Beaumonde and stop the virus from spreading.