Stardate 42901.3: The Enterprise is ordered to rendezvous with a special emissary, who travels in a modified probe to save time. The half-human and half-Klingon emissary K'Ehleyr is on a mission to stop an old Klingon sleeper ship whose crew is not aware of the Klingon-Federation alliance in the 24th century. She turns out to be a former love of Worf's. Worf is reluctant at first, but the two surrender to their passion after a holodeck battle simulation. K'Ehleyr, however, refuses Worf's traditional marriage proposal. When the crew of the old Klingon cruiser awakens and the alternative would be to destroy the ship full of warriors who were raised to hate the Federation, Worf and K'Ehleyr act as the Enterprise's highest ranking officers, thereby suggesting that the Klingon Empire is the dominating force.

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