Episode 5 opens in the tense hush that followed Hae-gang and Chung-won's blood-streaked handshake on the street, as Hae-gang is formally sworn in as president of the residents' association. His crew treats the inauguration as the finish line of their con — the reserve fund, along with the power to access it, is finally within reach — and they quietly begin preparing their exit, drawing up plans to move the money, emptying out their apartment, and working to secure an official stamp from the management office that would let them walk away clean. Ha-ri, however, offers Hae-gang a congratulations that isn't part of the act. She tells him, plainly and without irony, that now that he actually holds the position, he owes it to the residents to run it honestly instead of looting it and disappearing. Her words needle at something Hae-gang thought he had buried a long time ago, and for the first time since the scheme began, he hesitates over what winning was supposed to mean. Jang Suk-jin, meanwhile, has never fully let go of her suspicions about the strange family that moved in a few months earlier. Flush with goodwill after their unlikely alliance over the fabricated cultural-relic discovery, she pulls harder on the thread anyway, digging into inconsistencies in the intermittent family's story that put her on the verge of uncovering the truth. Lee Chung-won isn't far behind her. Word reaches him that the artifact which upended his new-town project and cost him his development deal wasn't unearthed by chance at all — it was planted — and he begins quietly gathering the proof he needs to use that discovery as leverage against Hae-gang. As Hae-gang settles into the actual duties of the presidency, poring over the complex's financial records for the first time as more than a means to an end, he stumbles onto something that has nothing to do with his own scheme: a long-running pattern in which certain units have gone years without paying their share of the building's heating costs. It's a small, unglamorous discovery, but it opens a door onto corruption that runs deeper than the reserve fund Hae-gang originally came for, and it gives him a reason to stay invested in the building that has nothing to do with the money. Torn between the con he built his whole plan around and the community that has started, almost against his will, to feel real, Hae-gang ends the episode by placing a serious, uncharacteristically quiet call to Ha-ri — the kind of call that suggests he's finally ready to talk about which version of himself is going to walk out of this building when it's all over.