Mother sends Leah and Adah to run errands. Leah leaves Adah behind, as usual, because Adah is slower.
Adah decides to go for a walk. On the way home, she has a creepy feeling, like "someone was behind, someone or something" (2.4.14).
When she gets home, no one seems to have noticed she was gone, and she slips into her room.
Later, Tata Ndu comes and tells the family that "the little crooked white child" (2.4.19) had been eaten by a lion.
Her mother is shocked, but her father instantly leads the family in prayer. Adah interprets Tata Ndu's proudly raised head as a sign that "he had won" (2.4.21) against Father, whose corrupt child has been eaten alive. In other words, Adah getting eaten is a sign that Father (and Christianity) are wrong.
At this point, Adah comes out to say, yo, I didn't die, and everything returns to normal. The next day she discovers that a lion had devoured a bushbuck near some of her footprints from the previous evening's walk.