Three Engineers land on a lush planet. One of the individuals eats a piece of ceremonial cake, which boils into a swarm of small scarab-like insects that dissolve him. On a nearby mountain, a primitive human woman watches the remaining Engineers depart aboard their ship, as one of the scarabs bites her on the back of the neck, infusing her with the DNA of the dead Engineer. In the aftermath, Watts is contacted by David, who tells her that it is likely the Engineers will come to investigate. As she considers this, the pyramids on the moon transmit a distress signal into space.