Strange deaths by a mysterious shadow leads the Fringe Team to the scene where they learn that a Russian astronaut was possessed by an alien and his brother is convincing Dr. Bishop to solve the equation to free him.

In the parallel universe, a kidnapper called The Candy Man abducts the boy Max. The Fringe Division is assigned to investigate the case and soon Olivia learns that Broyles' son Christopher was also abducted two years ago and returned blind and with physical deficiencies to his family. She asks Broyles to interview Christopher to see any missing information but Broyles does not accept; however his wife agrees that Olivia meets Christopher. Olivia recalls an old case and guess whether The Candy Man would be draining the pituitary gland from the children to use the hormones to stay young. Based on the received information, Olivia and Broyles meet Reverend Marcus, who was a former physician and now is responsible for a church where they believe the abductor is a member. Meanwhile Olivia meets Henry and asks him to help her to go to the Liberty Island to use the deprivation tank to return to her universe.

Peter grapples with the aftermath of recent events as Olivia desperately searches for an ally. Meanwhile, the Fringe Team discovers a critical device that communicates between universes.

When both of the two identities of people from the separate worlds experience the same catastrophes from incidents in just one world, the two Fringe teams collaborate. Walter crosses over to find that Jones is behind the phenomena, but to what ends? Also, the investigation into the Fringe-mole continues.