 Late in the game, Katherine tells the player about how her father tried to look for a unique whale called the White Mother and never came back.The player and Katherine set out to find the White Mother, which entails seeking out the four types of whales present in the game (humpback whale, North Atlantic right whale, sperm whale, and blue whale) and placing motion sensors on different points of the map.Eventually one of the sensors is set off, and the player witnesses the White Mother, a large albino blue whale, as Katherine remembers her father.