After escaping death by the skin of their teeth the crew is trying to settle in and get The Magus up and running. Emilio and Jahel's hard work pays off as The Magus rumbles awake. AJ and Clark test of their laserbeak flying camera results in Clark breaking it and the group coming to the conclusion that after the death of Sammy, they need another cameraman. Meanwhile, Kurt, Tess, Lincoln, and Lena continue work on forming a timeline for Emmet's tapes to try and get a sense of where he was last.
Lena informs everyone that when she last had contact with Emmet he had an infected bug bite that he couldn't get rid of so if they look for how infected it is on the tapes they can form an idea as to Emmet's last whereabouts and put an order to the hundred plus tapes left behind.
That night Jahel, the daughter of the ship's engineer Emilio, sleeps soundly as a dragonfly buzzes around the room. Slowly the dragonfly moves closer and closer until it lands on her cheek, crawls directly into her mouth and flutters down her throat. Her mouth shuts closed and her eyes snap open as she wakes to wander the boat. Jahel heads into Tess' room and wakes her to reveal that she is no longer Jahel, but Emmet. The spirit of Emmet delivers a cryptic message. It's not safe here, Tess must let him go and leave the jungle because 'they' have him. As Tess presses for more information Jahel's body collapses unconscious with the dragonfly trapped inside.
With a direction from the tapes and an assumption Emmet's alive after the paranormal encounter with a possessed Jahel the crew treks into the Jungle and continues their search for the lost doctor.
As night falls, they are forced to set up camp at a less than desirable location-underneath a mysterious tree filled with decrypted childhood dolls. If the location weren't creepy enough-hanging in the tree with the hundreds of other childhood memories, Lincoln finds Marbeley, his childhood bear. Tess concludes it's evidence that Emmet must have been there and they are headed in the right direction. However, Lincoln tossed Marbeley into the Indian Ocean years ago so how Emmet would have got the bear is puzzling to say the least.
As night continues on, the chilling tree proves to be even more frightening than it first appears whenLincoln unknowingly upsets a spirit it harbors by taking his bear back. Theteam attempts to make amends, but the damage has been done. In retaliation, the spirit that inhabits this section of the jungle and the doll–tree claims Tess by drowning her in the river. Devastated and determined, Lena and Lincoln figure out a ghastly way to satisfy the spirit by giving it what it truly wants-it's own mother back.
Lena recites a story that Emmet used to tell them as children and if they are to save Tess' life Lincoln must dig up the remains of the spirits mother at a grave near the tree and return it to the spirit.
Lincoln does so and the spirit releases Tess as she miraculously crawls out of the mothers grave. With Tess back the crew can continue their search for Emmet. Everyone now stronger and more resolute in their search.