In the seventh episode of "If Wishes Could Kill," the possessed Na-ri sets her sights on Ha-joon and Se-ah in the gym, sparking a dangerous confrontation. Meanwhile, Bang-wool and Geon-woo rush to their aid. They arrive just as Na-ri attacks Se-ah with a metal stick, prompting Ha-joon to use his body as a shield, resulting in a broken arm.
Se-ah tries to reason with Na-ri but fails to reach her, as she is under the control of an evil spirit. The possessed Na-ri launches another attack, and this time, Bang-wool, who has now gained the ability to see spirits due to his eye injury, strikes her with his knife, sending her crashing to the ground floor.
Geon-woo takes this opportunity to check on Se-ah and urges her to save herself. However, they are interrupted by Bang-wool and Ha-joon, who are unable to locate Na-ri. They decide to prioritize getting medical treatment for Bang-wool and Ha-joon.
At the hospital, Bang-wool informs Ha-joon that his newfound ability to see spirits may help him uncover the spirit that controls Haetsal. This revelation touches Ha-joon, who begins to refer to him as "brother-in-law" in excitement.
After receiving treatment, they reunite with Se-ah and Geon-woo to watch Hye-rung's video. Using the metadata from the video, they track its location and set off in search of the hideout where Hye-rung and Si-won once resided. However, their journey is cut short by GPS malfunctions caused by the spirit's efforts to thwart their progress. They narrowly avoid being hit by a truck driven by the same spirit.
Bang-wool exits the car, his senses alert as he seeks to locate the spirit. He notices a metal piece on the electric pole trembling, and in that moment, Se-ah begins to step out of the vehicle. Bang-wool realizes the impending danger and uses his body to shield Se-ah, sacrificing himself in the process. The metal rod pierces through his body, pinning him to the car door. Ha-joon is overcome with fear at the thought of losing him, as he desperately tries to assist.
On the contrary, Bang-wool is relieved that he has saved Se-ah's life and has drawn closer to Ha-joon. Haetsal senses trouble when one of her vases shatters. She instructs Se-ah and Geon-woo to hurry and find the house with the rainbow window, giving them her knife and compass to aid them in their search. Ha-joon remains behind, waiting for the ambulance to arrive, and calls Haetsal at the hospital, who assures him that Bang-wool will be okay.
After searching for a while, Geon-woo and Se-ah part ways. Se-ah discovers the house first, but the bridge leading to the second floor is too unstable. She decides to jump and asks Geon-woo to wait for her. Inside the room, she finds the phone and is about to grab it when possessed Na-ri stops her. A knife fight ensues as Na-ri tries to kill her.
Geon-woo overcomes his fear and takes the leap as well. He storms into the room and helps Se-ah fight Nari. Unfortunately, Na-ri is possessed too strongly, and Geon-woo stabs her with Bang-wool's knife. She drops her knife and crawls back against the wall, looking at them all in shock at the fact that they have injured her.
Se-ah grabs the phone and tries to persuade Na-ri to join them, assuming that she is no longer possessed and telling her about Haetsal. As Se-ah approaches, Na-ri cuts the silk bracelet, causing Se-ah to fall and convulse while the phone in her hand turns red. Na-ri laughs as Geon-woo panics. Haetsal's bracelet also breaks, signaling the danger that Se-ah is in.
