Episode 1 of "Bloody Flower" opens with a serial killer terrorizing Guam City. Ten people have gone missing, and the latest victim is a man named Hong Jae-gwang. The culprit, Lee Woo-gyeom, conducts medical experiments on his victims. The police finally get a lead and corner Woo-gyeom while he's treating his cancer patient, Lee Chang-se. Detective Gong tries to deter Prosecutor Cha Yi-yeon from being present during the arrest, but she refuses to back down. Woo-gyeom remains eerily calm and even tries to negotiate some time so that he can finish his treatment.
Prosecutor Cha is a self-righteous, no-nonsense bulldozer who is also the youngest daughter of the rich and influential Sejin Group. However, since she only cares about justice and hard facts, she's being overlooked for promotions. It gets on her nerves when everyone believes that she will just go running back home when she fails as a prosecutor.
She privately interrogates Woo-gyeom, who seems to know all about her from the internet. He claims that he's experimented on 17 victims (who then died) and has developed a cure for any and all incurable diseases. He's annoyed when she shows no interest in his cure but focuses on the crimes. And she's frustrated that he doesn't understand the gravity of his crimes.
Meanwhile, Defense Attorney Park Han-jun has gone from taking socially unfair cases to defending rich culprits for money. It turns out that his young daughter, Park Min-seo, suffers from Batten disease, and he's had to scrounge up 2 million for a new clinical treatment. He doesn't tell his wife, but the doctor who promised him the cure, Moon Se-guk, has gone missing.
Back to Woo-gyeom's case, Prosecutor Cha is determined to get to the truth. She pushes through Woo-gyeom's calm demeanor and confronts him with evidence of his crimes. He remains unfazed, confident in his ability to manipulate the system.
Meanwhile, Han-jun is struggling to provide a normal life for Min-seo**. He sees that she has no friends and wishes to go home. Fate answers in the form of Reporter Jo Woo-cheol, who is in touch with Woo-gyeom. Reporter Jo was once an activist but lost his job after being sued by the prosecution. Now he writes clickbait articles and chases views to support himself. He reveals that he will get a handsome commission if he convinces Han-jun to defend Woo-gyeom.
Unfortunately, Woo-gyeom is able to lure Han-jun by revealing that Moon Se-guk is one of his victims. To make matters worse, he claims that Se-guk never had any cure. Han-jun is upset and further overwhelmed when Woo-gyeom offers him the 2 million he's lost as his fee. And as the cherry on top, he will also cure Min-seo.
Han-jun hesitates, weighed down by the fear that the killer knows too much about his private affairs. Woo-gyeom steps in with a proposal to meet his success stories, and he remains true to his word, handing over a million when Han-jun departs. The lawyer ponders Jo's involvement in this entire saga, and the reporter reveals that Woo-gyeom approached him a week prior to his arrest, paying him to locate his cured patients and write an article. However, they only know of two patients: Lee Chang-se and Sang-woo, a boy once confined to a wheelchair due to polio.
An autopsy of the dismembered bodies reveals that Woo-gyeom used a compound far before the US discovered it. Prosecutor Cha learns that Woo-gyeom was a brilliant student whose medical career was derailed after he went into a coma for three years and lost his mother. All his victims also happen to be criminals, but she doesn't care; murder is murder. She decides to find the remaining dead bodies so that he cannot use them as leverage for a lighter sentence. She puts the Guam cops on the search but it backfires as the public believes they are wasting manpower based on hearsay.
The Chief Prosecutor is pressured and he orders Prosecutor Cha to take another approach. She pretends to be interested in Woo-gyeom's clinical trial but doesn't really care when he declares that his trial is a success and that he always planned to turn himself in afterwards. In exchange for her attention, she demands the locations of the remaining dead bodies. He gives in and the cops soon find the bodies on a mountain. The last victim, Hong Jae-gwang, is drained of all blood.
At the same time, Reporter Jo and Han-jun finally find Sang-woo. His polio is, in fact, cured as he goes from using a wheelchair to walking. A flashback reveals why Woo-gyeom cooperates. In exchange for the dead bodies' location, he wants a plea deal. The deal is for Prosecutor Cha to help Woo-gyeom prove to the court that he can indeed cure any incurable disease without even lifting a scalpel.
The scene unfolds with a sense of urgency and suspense, as each character struggles with their own motivations and desires while grappling with the complexities of Woo-gyeom's case. The interplay between the characters and their interactions with each other adds depth and complexity to the narrative, making it more engaging and immersive for the reader.
