The Popol Vuh gives the twins a father and an uncle who played ball too loudly above the underworld and were summoned down by its lords, One Death and Seven Death, who defeated and killed them. The father's severed head was hung in a calabash tree; it spat into the hand of Xquic, a daughter of one of the lords, who conceived and fled upward, and Hunahpu and Xbalanque were born. Before their own summons the brothers bring down Vucub Caquix, a great bird who had set himself up as sun and moon while neither yet existed, shot from his fruit tree by Hunahpu and stripped of his teeth and his eyes.
Summoned in their turn, the twins go down knowingly. They pass the river of blood and the crossroads, name the lords correctly instead of greeting wooden manikins, and survive a series of houses: the dark house, the razor house, the cold house, the jaguar house, the fire house and the bat house. In the last, Hunahpu is decapitated by Camazotz and his head hung over the ballcourt, and his brother contrives a substitute head so that play can continue until the real one is recovered.
They cannot be beaten and cannot be allowed to leave, so they arrange their own deaths, are burned and ground and thrown into the river, and come back first as catfish and then as travelling performers who dance, burn a house and restore it, sacrifice a man and revive him. The lords ask to be killed and revived themselves. The twins kill them and stop there. That is the end of the power of Xibalba over the living, and the ground is then clear for the making of people out of maize. The brothers then rise into the sky as its lights, Hunahpu as the sun and Xbalanque as the moon in most readings of the ending.