Stardate 43152.4: The entire colony on Delta Rana IV has been destroyed by an unknown enemy - except for the house of Kevin and Rishon Uxbridge. After an away team has visited the survivors, Deanna is plagued by a penetrative melody in her mind. An alien ship attacks the Enterprise in orbit, the Enterprise has to retreat. The alien ship returns and destroys the Uxbridge house - but after some time the house reappears. It turns out that Kevin Uxbridge is not human, but an immortal Douwd who refused to fight against the attacking Husnock, even as they killed all the 10,000 colonists, including his human wife Rishon. Furious about his loss, Kevin then wiped out the whole Husnock civilization, numbering 50 billion. Ashamed of what he had done, his only intention was to veil his crime and stay alone.

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