The Japanese unexpectedly leave the island and Allison says he loves Sister Angela and proposes marriage. But she shows him her engagement ring and explains it is a symbol of her forthcoming final holy vows. Later both in celebration and frustration, Allison gets drunk on sake. He blurts out that he considers her devotion to her vows to be pointless, since they are stuck on the island "like Adam and Eve." She runs out into a tropical rain and falls ill as a result; Allison, now sober and contrite, finds her shivering. He carries her back, but the Japanese have returned, forcing them to retreat to the cave. Allison sneaks into the Japanese camp to get blankets. He kills a soldier who discovers him, alerting the enemy. To force him into the open, the Japanese set fire to the vegetation.