In the year 2079, CIA agent Snow finds himself locked up for a crime he didn't commit—murder. He is accused of taking the life of undercover agent Frank Armstrong, who had uncovered incriminating evidence about another agent leaking secrets concerning the space program. But the reality is far more complex; Snow was attempting to save Frank from a deadly assault when unknown assailants attacked him. Just before his demise, Frank managed to pass on vital evidence to Snow for safekeeping, and he does so without drawing the attention of the governmental forces that would soon capture Snow.
Scott Langral, the Secret Service director played by Peter Stormare, orchestrates Snow's conviction based on the President's counsel, leading to Snow being sentenced to thirty years in the notorious maximum-security space penal colony known as MS One. In this chilling institution, prisoners exist in Stasis throughout their sentences, eliminating any hope of rehabilitation. Meanwhile, Snow's friend, fellow agent Harry Shaw, undertakes the mission of locating Mace, Snow's handler, who holds the key to Frank's briefcase where the stolen secrets are hidden.
On the grounds of MS One, the President's own daughter, Emilie, embarks on an investigation into the controversial Stasis technology. She has been granted access by the prison’s owners, who are eager to promote their facilities for a global market, despite the United States' hesitance to sign a deal. Beneath the surface, the facility is entangled in a greater conspiracy involving funding from private deep-space exploration firms keen to exploit the inmates as guinea pigs for their Stasis procedures meant for interstellar travel.
During her investigations, Emilie interviews a dangerously unhinged inmate named Hydell, portrayed by Joseph Gilgun. In a shocking turn of events, Hydell manages to escape, unleashing chaos among the prisoners and igniting a catastrophic riot led by his brother, Alex. As the turmoil unfolds, Emilie is captured and shot, along with numerous others.
In a twist of fate, Shaw persuades Langral and the President to send Snow on a daring rescue mission instead of risking a full assault on the prison. Initially hesitant, Snow changes his mind upon learning that Mace, who could help prove Snow's innocence, is still on MS One. Attempts to resolve the hostage situation fail, forcing Snow to infiltrate the prison, where Alex takes Emilie hostage, realizing her identity as the President's daughter.
Emilie makes a daring escape from Alex with her bodyguard Hock, who tragically sacrifices himself to ensure her survival as the situation deteriorates. Snow, disguising Emilie's appearance to avoid drawing attention, risks everything to rescue her. They locate Mace, but the Stasis has left him mentally incapacitated and incoherent. Despite all odds, Snow and Emilie bring Mace along in their desperate bid for freedom, only to find themselves facing unforeseen disaster—MS One is losing orbit and is on a collision course with the International Space Station.
As chaos erupts, Mace dies in the hull breach, leaving Snow and Emilie to confront their grim reality. When they reach the escape pod, Snow discovers it only has one seat. He selflessly sends Emilie to safety, thinking of her life before his own. Yet, Emilie is determined to remain behind, believing that the lives of the remaining hostages depend on her presence. In a heart-wrenching betrayal, Hydell murders the hostages, even after Emilie reveals her location to him.
Together, Snow and Emilie uncover that the prisoners were being duplicitously used as test subjects in violation of ethical standards. In a dramatic turn, Alex captures Emilie, and amid the ensuing conflict, wounds Snow, leaving him for dead. The stakes escalate as Alex contacts the President, wielding Emilie's life as leverage against the government. In a race against time, scenes unfold until Langral's men ultimately decide to destroy MS One.
As the prison explodes, Snow and Emilie make a daring escape. Utilizing their space suits, they plummet into the atmosphere, miraculously landing in New York City, where Snow is promptly arrested. Later, Emilie uncovers that Mace’s disjointed ramblings were a code leading to Frank’s briefcase, but disappointment awaits when it’s found empty. However, Snow had withheld the unlocking code, revealing Shaw to be the real mole, leading to his arrest, while Snow is set free.
As his belongings are returned, including a lighter from Frank that seemed inconsequential, Snow discovers a hidden memory card with the actual incriminating evidence embedded within it. A playful moment occurs as Emilie meets Snow, teasing him upon learning his first name is Marion, as they walk away together, the sense of victory layered with the scars of their harrowing journey.
