Antidote is a 2021 science fiction horror film written and directed by Peter Daskaloff along with Matthew Toronto.
Plot
A woman, Sharyn Berkley, is taken to the hospital by her husband after intense stomach pain. She is informed that she has acute appendicitis and will require emergency surgery. After awakening from the surgery, she is greeted by Dr. Aaron Hellenbach. Sharyn finds that the surgical incision on her lower abdomen is almost fully healed. She questions Dr. Hellenbach about this and is told that the facility has unconventional healing methods. She flees from her room and meets Rizzo briefly before being sedated by staff.
Locked in her room, Sharyn begins communicating with her neighbor Everett via notes passed through a hole in the wall. She witnesses a man with bleeding eyes being led through the hallway outside and hears Everett being attacked in his room. She is visited by Dr. Hellenbach, who asks her whether she has any regrets. She lies and says she does not. She begs to go home, but Dr. Hellenbach says that she is not ready. She is introduced to several other patients, including Cassandra Franklin; Rizzo; Marjorie, whose eyelids are paralyzed; Lester, who is criminally insane; and Everett, a criminal attorney. Everett reveals that his tongue was cut out but grew back. Cassandra tells Sharyn that they are in an experimental facility and that she had been burned alive.
Rizzo is selected for a procedure during the "Indexing" and reveals to Sharyn that he had been impaled. Sharyn observes Dr. Hellenbach administering a healing serum to Rizzo and asks why this was done to him. Dr. Hellenbach ominously tells Sharyn that "he did this to himself."
Dr. Hellenbach finds Sharyn wandering around the halls and takes her to his office. In exchange for using the phone, Sharyn agrees to tell Dr. Hellenbach about her ex-boyfriend, Nico, a drug trafficker who committed suicide. She attempts to call her family but finds that the phone does not work. She begins wandering the halls again and finds a room containing a piano and a noose. As punishment for not following the rules, her left leg is amputated and then subsequently reattached. Rizzo comes to visit and tells her that he thinks the military is harvesting test subjects in order to develop immortal soldiers. Sharyn tries to escape for a third time but is likewise unsuccessful.
Everett tells Sharyn that if they cooperate, they will be released from the facility in three months. However, after Sharyn reveals to Everett that she saw Nico in the facility, ten years after he supposedly committed suicide, Everett confronts Dr. Hellenbach about his release date. Hellenbach assures him that his file will be reviewed in three months but when Everett continues to argue his tongue is once again cut out.
Sharyn asks Cassandra about her time at the facility, but Cassandra says that she does not know how long she has been there. They conspire to escape. Sharyn manages to steal Dr. Hellenbach's keys from his pocket while pretending to lose her balance. She and Cassandra scour his office and find a map of the facility. They manage to avoid being caught by Dr. Hellenbach in the medication room, but several nursing staff recognize them and corner them in the hallway. Cassandra attempts to kill herself by cutting her neck, which grants Sharyn time to flee. She forms an alliance with Rizzo after he protects her from one of Lester's attacks. However, while the duo hide in an empty room during the Indexing, Rizzo gropes and kisses her. In retaliation, she rips off Rizzo's testicles before continuing her escape.
Sharyn manages to reach the exit door and escape outside. An alarm immediately goes off as staff members chase her. She finds her way to a residential home, but is followed by a staff member and eventually brought back to the facility. Upon awakening, Sharyn finds that she is being hanged in the piano room and dropped to the floor before dying. She asks Dr. Hellenbach why he keeps healing her instead of killing her, and is told that they do not kill people here. He asks her about her regrets again and she denies having any regrets other than being a drug addict. Dr. Hellenbach tells her that she is not a good liar.
Later Sharyn confronts Everett and asks him how he came to the facility. He explains that he had been in a bad car accident resulting in broken ribs and neck injuries. Sharyn asks him whether he has ever done anything terrible and explains that she thinks that is the reason they are at the facility.