 Set in the 24th century , the series follows the adventures of the crew of the Starfleet starship Enterprise @-@ D. In this episode , while the ship is visiting the planet Ligon II to retrieve a vaccine , crewman Tasha Yar ( Denise Crosby ) is abducted by the leader of the Ligonians . The race abide by a strict code of honor , and their leader seeks to use Yar as a pawn to increase his own personal power . 
