A flu epidemic has broken out at Nyaru Menteng. The prescription? Quarantined rest, lots of fluids, and...onion juice? Meanwhile on Palas Island, two female orangutans have broken through an electric fence. Back in class, coconut husking and tree climbing are on the curriculum, the latter with the help of some enticing fruit kebabs. Later, Beni is dismayed to discover he's back on a health kick, but his ability to dodge his diet shows his resourcefulness--a trait that will serve him well in the wild.

Tense efforts to reunite traumatized Dilla with her newborn baby are met with mixed results, but the staff isn't giving up. Meanwhile, troubled Luthy is paired with a female orangutan to help with her behavioral issues. And on the Rungan River, a flash flood threatens the release schedule of female Clara and her baby Clarita. Not with them on this journey is Alba, a rare albino orangutan. Unlike Clara and Clarita, her condition means she may never be eligible for the stated mission of the jungle school: an eventual return to the wild.