Netflix released a new Korean thriller, Wall to Wall, on July 18, 2025. The film follows the story of Kang Ha-neul as Woo-sung, a man in his thirties who finally secures an apartment after years of saving. To buy it, he not only spends his savings, but also signs high-interest loans and even puts up his mother’s farmland to close the deal.However, after moving into his Seoul flat, he’s hit with persistent noise from the apartment upstairs. The mystery sound disrupts his routine, also leading to arguments with other tenants, as many believe it is coming from his place. Tension rises as no one can trace where the sounds are coming from. In search of answers, Woo-sung teams up with Yeong Jin-ho, the neighbor living directly above, played by Seo Hyun-woo. The two begin investigating the building together to figure out the root of the disturbance. Then, there’s Jeon Eun-hwa (Yeom Hye-ran), the building’s secretary, who tries to keep the peace as complaints escalate. In Wall to Wall, it's uncovered that Jin-ho caused the sounds throughout the building. Ultimately, Woo-sung laughs in the end, consumed by the harsh twist of fate and the things he had to endure.Kang Ha-neul's Wall to Wall explainedWall to Wall begins in April 2021, with Kang Ha-neul's Woo-sung, a regular desk worker, putting all his funds into a unit at Royal City Sileos Complex. He banks on the future GTX rail plan to boost value. However, by 2024, the project stalls as the rail plan is put on hold.On the other side, the downstairs neighbor starts sticking notes to his door, saying her school-going kids are being disturbed by noise from his flat. He ignores it at first, but the complaints continue. When he brings it up with building secretary Eun-hwa, she tells him that it’s a load-bearing structure, and sound can travel strangely.The next day, his office mate Chang-wu, facing the same financial pinch, recommends a crypto scheme (GB Coin), saying it’ll spike 815% on August 15. Woo-sung has no money left, so he sells his flat last minute, visiting Shinsegye Real Estate for ₩800 million. He requests an advance of ₩85 million from the client and puts that straight into the coin.At home, the noise complaints keep growing. He suspects the family below is framing him, as he also spots a camera aimed at his unit on the window. A group soon gathers outside his flat to confront Woo-sung. They find a phone with a speaker playing a construction sound, which Woo-sung denies ownership of. During the argument, the man downstairs fakes a fall, making it look like Woo-sung pushed him. It leads to the police taking Woo-sung into custody.As Woo-sung remains in custody on the Liberation Day, the coin hits its peak at 8:15 am. But Woo-sung’s phone is broken, and the police stop him from logging in elsewhere. Despite his attempt to sell the coin, he is stopped by the police, and the coin's value falls. Soon after, Eun-hwa steps in to save him, but he loses all of his money.Pushed to the edge, Woo-sung writes a note and prepares to end his life. But just then, his upstairs neighbor Jin-ho storms in, again blaming him for the noise. This time, Jin-ho hears it too and realizes Woo-sung isn’t the one. Together, they join hands to dig deeper.Jin-ho and Woo-sung in Wall to Wall (Image via X/@NetflixKR)But soon, Woo-sung discovers the unknown phone in his apartment linked to a local Wi-Fi, which belongs to Jin-ho. That’s when it all clicks. Jin-ho was behind the noise from the start in Wall to Wall. He had broken into Woo-sung’s place at night, learned about his crypto plan, and planted a speaker with the phone to fake the noise. He teamed up with the 1301 couple, promising to help extend their lease in return for tormenting Woo-sung.They installed gear in his apartment and gaslit the neighbors into blaming him. Later, when the 1301 woman turns on Jin-ho and demands help, he kills her and tries to trap Woo-sung again. Woo-sung, who witnesses everything, pretends to cooperate with him. In the final act, Woo-sung and Jin-ho confront Eun-hwa in her penthouse. Jin-ho, seeking closure for his exposé, believes key evidence is hidden behind a steel door.Years ago, Eun-hwa buried his report exposing Royal City Sileos’ weak construction during her time as a prosecutor. She later bought units in the same faulty complex after silencing his work. Jin-ho had been spying on her ever since, uncovering a ledger listing bribes and embezzlement tied to the construction.But when things turn violent, Woo-sung turns on Jin-ho and helps Eun-hwa. She arrogantly admits to her crimes until Jin-ho fatally stabs her in a last move, though he’s too injured to escape. Left with the evidence, Woo-sung decides not to fight anyone’s battle.Jin-ho killing Eun-hwa in Wall to Wall (Image via Netflix)He burns the ledger and the deed to his home, then walks out as the penthouse explodes from a leaking gas line, choosing silence over justice. At the prosecutor’s office, Woo-sung stays silent. The official, aware of missing evidence, implies that the system won’t dig deeper. In the closing scene, Woo-sung returns to his mother’s place in Namhae.Later, when he revisits his old Seoul apartment, he hears the noise again, but this time, it’s not real. It appears to be the echo of past trauma, still haunting him. In the conclusion of Wall to Wall, Woo-sung breaks into laughter, not out of joy, but at the cruel irony of it all. It may also be because he still holds the original ownership papers, meaning the apartment is still legally his, since he secretly burned the resale documents.Will there be a follow-up to Wall to Wall? Here’s what the ending impliesNo sequel has been confirmed for Wall to Wall, and from the way the story wraps, it likely won’t get one. The broken system stays intact, and Woo-sung, though alive, walks away with nothing but scars. He’s mentally wrecked, and the final moment when he laughs after hearing phantom noise shows how deep the trauma runs.Wall to Wall doesn’t aim to deliver justice or a hopeful resolution. Instead, the movie highlights how people, even after buying property in the city, are crushed under loans, rising costs, and broken promises. It’s a grim but realistic look at how ownership often brings more burden than stability.Sure, there’s room for a continuation. However, Wall to Wall feels whole as it is. It delivers a solid standalone narrative about survival, failure, and the toll of urban pressure.Wall to Wall is available to stream on Netflix.