1907. Afonso starts life anew on a tropical island off the African coast, as a plantation physician. He is tasked with treating servants "infected" by Banzo, a profound homesickness fatal to many slaves who succumb to starvation or take their own lives. To prevent spreading, the group is sent to a secluded hill encircled by forest. Afonso tries to heal them, but understanding their spirits is a challenge stronger than any medical intervention.