Onboard the Taelon Mothership, Ronald Sandoval (Von Flores) tells Howlyn (Alan Van Sprang) that he has the perfect bait to lure Renee Palmer (Jayne Heitmeyer) back to the ship and into Howlyn's hands. The bait is renowned resistance fighter William Boone (Kevin Kilner), who has been kept in a state of suspended animation onboard the Taelon vessel for the past three years.

Boone finds himself portalled back to Earth, where he immediately visits his sister Sarah (Sarah Lafleur) at her apartment. After overcoming her shock at seeing her brother alive, Sarah tells Boone that the Taelons are gone, so he has no more aliens to worry about. Regardless, he tries to contact his old friend and former colleague, Augur. At Augur's lair, J Street (Melinda Deines) and Renee receive the message from Boone. Suspecting the sender to be an imposter, Renee arranges to meet Boone at a nightclub where she convinces him to undergo a full diagnostic examination so she can verify his identity. Street conducts the exam at the lair and finds circulatory nanobot locators in Boone's bloodstream, a system Street and Renee recognize as one of Sandoval's favorite ways of tracking. Street extracts the locators. After a briefing from Renee about the new alien threat of the Atavus including the use of Atavan human hybrids, Boone accompanies her on a mission to the Mothership, where they plan to blow up the Atavan hybrid chambers.

Renee and Boone shuttle to the Mothership and split up to find the chambers. Boone, however, has another target on his mind - Sandoval. Boone holds Sandoval responsible not only for his three lost years, but also for the murder of his wife. Things go awry when Sandoval sneaks up on Boone and holds him at gunpoint. Renee abandons her goal of destroying the chambers to save Boone. She launches an energy screen that gives them just enough time to escape, but not before Sandoval shoots Boone in the arm.

Back at the lair, Renee accepts Boone's apology for letting his hatred for Sandoval ruin their mission. While she tenderly dresses his wound, their attraction for each other grows and they kiss. The next day, Boone returns to the lair with Sarah, who expresses her desire to combat the Atavus with them. Her chance to do so comes moments later as Street detects what she suspects is a subterranean hybrid chamber hidden near a downtown nightclub.

Sarah accompanies Street to the club where she lures one of the male patrons into an alley and kills him, exposing herself as a hybrid. Howlyn suddenly emerges from the shadows, ordering her to bring Renee to him.

Sarah returns to the club and tells Street she has just seen an Atavus. Street contacts Renee, who races to the scene with Boone. When the two enter an abandoned subway stop behind the club, Boone is jumped by Howlyn. Boone stabs Howlyn with an energy knife, and is horrified when Howlyn immediately heals and prepares to continue his attack. Sarah pulls a gun and is about to shoot Boone when Renee beats her to the draw and fires, killing Sarah. Sandoval arrives and convinces Howlyn to flee before authorities arrive and the Atavan presence is revealed.

Back at the lair, Boone bids a sad farewell to Renee. While he doesn't blame Renee for his sister's death, he tells her he's not prepared to risk the lives of anyone else he loves. Feeling he would only put Renee's life in jeopardy if he continued to fight the Atavus, he decides it's best for him to leave.

This episode synopsis was originally produced by The Official E:FC Website and remains the property of Tribune Entertainment.