When a 1950's passenger plane arrives in 21st century Cardiff due to the Rift, the Torchwood team try to help three temporal immigrants adapt a new life in the city.

The team discovers a ring who are kidnapping Weevils - wild alien creatures that have come through the Rift and are hiding on Earth - which leads Owen down a dark path to confront the future of his own existence.

Jack and Tosh arrive at an abandoned dance hall to investigate reports of strange music being heard from within. Jack recognizes the music as from the 1940's, and just as quickly they turn a corner to find themselves in the 1940's themselves. Tosh quickly learns that 1941 Cardiff can be a scary place to be Japanese, as Captain Jack Harkness meets a familiar name. Back in 2006, Gwen, Owen and Ianto frantically try to find their missing friends, though complications arise-- not just from their own inner demons, but also one Mr. Bilis Manger, the caretaker of this dance hall where nothing is as it seems...

The Rift is splintering - strange phenomena like UFOs and ancient soldiers are falling through time into various places around the world. These events resemble those in the prophecy of the arrival of Abaddon, the Great Devourer, who will lead the world into shadow and bring about the End of Days...