Unaware that Howlyn (Alan Van Sprang) has hybridized J. Street (Melinda Deines), Renee Palmer (Jayne Heitmeyer) and FBI Director Hubble Urick (Frank Moore) visit the Doors International bio-med team. Under the guidance of Dr. Copple (Simon Reynolds), the team is in the final stages of developing an antidote for Atavus hybrids.

Renee meets Street at the Resistance lair and tells her how close Copple is to completing the antidote. Fighting against her newfound Atavan urges, Street compels Renee to tell her where Copple's facility is located, hoping she can be cured. Upon leaving the lair for the research lab, Street is met by a bartender from the Flat Planet Café, the hybrid who orchestrated her capture by Howlyn. He takes her to Ronald Sandoval (Von Flores), who is able to extract the location of Copple's lab from her .

That night, Renee finds Street at the Flat Planet. Noticing Street is feverish and acting strangely, Renee decides to take her to the hospital. Upon leaving the club, Street turns on Renee, brandishing Atavan cleaves and slicing Renee's arm. Street escapes back into the club, where the bartender and two other hybrids intercept her, demanding she accompany them on a mission. Street leads them to the lair, where the other hybrids hope to kill Renee. However, Renee is ready for them. After shooting the hybrids, she takes Street to the hospital to await the antidote.

Sandoval bursts into Copple's lab with a team of storm troopers, kills the staff and runs off with the finished antidote. Furious that Street told Sandoval where to find the lab, Urick confines her to a government-run research facility. There, the coldhearted Professor Zimmer (Philip Craig) uses mind-probing techniques to interrogate his new detainee for information about the location of Atavus hives and the agenda of the alien intruders.

Onboard the Taelon Mothership, Howlyn orders Sandoval to destroy the antidote. Sandoval does so, except for one vial, which he keeps. Renee tracks Sandoval down, threatening to kill him for murdering Copple and stealing the hybrid antidote. Sandoval uses the vial to strike a deal, asking for immunity in exchange for the serum.

Under the cover of darkness, Renee meets Sandoval in an alley to complete their deal. She hands over Presidential documents guaranteeing his immunity. He gives her the vial, telling her it contains just enough serum to save one hybrid, or to be used to begin mass-producing the antidote, but not both. For that, she would need Copple's research data, which he carries in a steel attaché. Renee pulls out her gun and shoots Sandoval in the hand, forcing him to drop the case. She grabs it and runs.

With the antidote and research data in her possession, Renee persuades Urick to free Street, who is given the hybrid antidote and makes a full recovery.

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