Enterprise finds a planet that has had its surface obliterated, except for the appearance of a house and the land around it, and a retired elderly couple who live there. When Deanna senses who and what one of the couple, Kevin, truly is, her senses are blocked by the placing music from a music box into her mind. And when Picard senses trouble, Kevin tries to lure the Enterprise away by sending the evil Husnock race after them. However, Picard stays one step ahead of Kevin, and eventually figured who, or what Kevin is. Being discovered, Kevin takes the music form Deanna's mind. He also explains that he is a Dowg, a non-corporeal life form that can shape shift into any form, whom had married his wife Rishan when he was in human form. When the planet was attacked, he tried to fool the Husnock, since his own prime directive was that he would not kill, but when his wife is killed in the attack, he takes the ultimate action against the Husnock.