Gordon and Alyx Vance are trying to rescue her father, Eli Vance, who's being held prisoner in Nova Prospekt. They meet up with Judith Mossman, who works for Wallace Breen. Alux plans to use the combine teleporter to teleport herself and her father, to Dr. Kleiner. But something goes horribly wrong.
Trivia
Entanglement consists of the four maps d2_prison_06, d2_prison_07, d2_prison_08 & d3_c17_01.