On Sirius 6-B, a desperate trio approaches a long‑silent communication bunker to reactivate its distress beacon. Only one survives the peril, triggering the beacon as Screamers close in and kill the others, leaving a bleak first impression of the danger lurking on the planet.
Two months pass before a rescue team reaches Sirius 6B aboard the Alliance Command spacecraft Medusa. Since the death of Joseph Hendrickson, there has been no word from the outpost, and it’s presumed the Screamers have drained their batteries or otherwise cut off the signal. A looming planet‑wide solar meteor strike tightens the window for rescue to six days, forcing the crew to move quickly. Pilot Olof Soderquist, Jody Richardson, stays behind to monitor the ship, while the rest press outward to locate any signs of life or salvageable assets.
Day 1 unfolds as the rescue party travels toward the beacon’s last known coordinates. They discover a dormant Screamer factory hidden inside a hillside bunker, a grim workshop where Screamers repurpose human victims’ parts as raw materials. The team spends the night in the eerie shelter, and Commander Andy Sexton, Greg Bryk, makes a fateful choice: by charging one of the dormant screamers to download its schematics, he unintentionally reactivates the entire factory and sets events into motion that will haunt them.
Day 2 brings a brutal turn. A Screamer boards Medusa and kills Soderquist, the pilot Jody Richardson who had stayed behind. As the team treks toward a life‑form reading within an old Berynium mine, they are ambushed by unseen figures and more Screamers. Romulo, Sgt. Romulo, Dave Lapommeray is too injured to move but urges his teammates to escape while he detonates a grenade to thin the threat. Sexton orders an immediate retreat back to Medusa, trying to preserve what remains of the mission and the crew.
Day 3 aboard Medusa reveals a starker problem: a Screamer has drained the ship’s fuel cells, making any return impossible without finding a new power source. The crew adjusts by planning a detour to the mine complex in hopes of locating fuel or a solution to re‑power the vessel.
Day 4 shifts the drama to the mine complex itself. Lt. Victoria Bronte, Gina Holden, rescues a local named Hannah, who guides them to other survivors hidden in the mine. The population once numbered 400, but the Screamers have slaughtered many, leaving a fractured group that has prepared tunnel explosives to deter any future intrusions. Bronte negotiates a dangerous deal: safe passage home to Earth if they help locate fuel cells to power Medusa. In a chamber of the mine, Bronte discovers three teenagers bound to metal racks, pleading for release, and nearby a dissection table smeared with blood and viscera. Bronte and her team release the prisoners, only to find they are Screamer cyborgs. One is destroyed, but Rafe Danielli, Christopher Redman, is killed by another. The two remaining Screamers escape and kill a guard, and the cyborgs later ambush the group, taking more lives before Sexton and Bronte manage to destroy them. With the danger escalating, the team detonates the mine’s explosives to cover their retreat, hearing Screamers pressing in as they flee.
Day 5 sees the group wandering into another abandoned mine where they make camp for the night, still pressured by the dwindling time and the growing threat outside.
Day 6 crescendos at a power relay station that Guy, Stephen Amell, knows well. Hannah, a local survivor, becomes paranoid about who is a Screamer and presses a knife to Guy’s throat in a tense confrontation; Sexton intervenes and ends the threat by killing Hannah. The team presses forward, while medical officer Schwartz, Holly Uloth, stays behind briefly to cover the fallen and the casualties. As more Screamers advance, a masked stranger appears and leads them toward safety, firing an electromagnetic weapon that disables the pursuing attackers.
The stranger introduces himself as Eugene Orsow, Lance Henriksen. He claims there are no fuel cells to spare and warns that Screamer forces will converge on their position within hours; only a perimeter defense might hold them off. Sexton discovers Orsow secretly installing fuel cells to the power grid, and the two clash over their goals. Orsow dies when Sexton wounds him and tears out Orsow’s TAB, then pulls the power cells away to move toward the others.
Danielli breaches the compound, triggering a self‑destruct countdown. The wounded Danielli is revealed to be a human–Screamer hybrid, and the hybrid turns on Sexton, only to be destroyed by Bronte. Bronte and Guy escape as the facility begins to crumble around them. They return to Medusa to discover Madden, Tim Rozon, has already infiltrated the ship and transformed into a hybrid following Danielli’s attack. Guy destroys Madden with the electromagnetic cannon, preventing the hybrid threat from overtaking the crew.
With the fuel cells installed, Medusa powers up and lifts off as Sirius 6-B endures the meteor storm. Bronte and Guy enter cryogenic sleep for the two‑month journey back to Earth. They awaken upon arrival in orbit, and Bronte discovers she is pregnant, farther along than expected for the voyage. In a final, unsettling twist, Guy is revealed to be a hybrid as well, and Bronte’s unborn child seems to respond — a tiny claw rising inside her womb as the ship returns to safety, leaving them with an ominous new future to confront.
