Kaybok was a high-ranking officer of the Klingon Defense Force and the commander of the IKS M'Char, a Klingon Bird-of-Prey. In 2372, Kaybok used the M'Char to trap the Xhosa in its tractor beam. The USS Defiant was launched from space station Deep Space 9, when Benjamin Sisko received a priority 1 distress call from Kasidy Yates, the captain of the attacked freighter. When the Defiant contacted Kaybok, he told the Starfleet crew that the Klingon High Council had issued him orders to search every ship that tried to leave Bajoran territory. The Defiant responded by attacking the M'Char and the Bird-of-Prey eventually left the area.