Undeterred by warnings, doctors Lúcia, Damião and Enzo travel to isolated Aguazul with a Zika vaccine. But no one is ready for the passionate pushback.

After Mateus's shocking act, Damião follows a mysterious woman into the jungle, while Lúcia and Enzo vaccinate the villagers with unexpected results.

In a bold bid for help, Lúcia challenges the cult leader to heal a nonbeliever. But the cure takes a surprising turn as the outside world presses in.

Curiosity lands Damião and Enzo in Aguazul's bizarre blue water as Lúcia enters the Chosen One's inner circle and attempts to control the message.

Angelina's story comes to light while Lúcia takes her place at the healer's side. Damião tries to make amends -- until everything goes sideways.

As Lúcia looks for mercy, Damião and Enzo face the ultimate test. Compounding the chaos, outsiders descend on Aguazul, clamoring for the cure.