: Trapped in the dark with limited resources, the characters must overcome their personal differences. Dong-won and the cynical Man-su are forced to work together, leading to hilarious bickering and genuine bonding.

Heavy rains trigger a massive geological collapse, and the entire apartment building plunges into a giant sinkhole in the middle of the city. Key Plot Points

: The film captures the terrifying, surreal moment the earth swallows the building, trapping the residents deep underground with no easy way out.

: While those inside try to climb out of the wreckage, rescue teams on the surface struggle with the unstable ground, as more rain threatens to fill the hole and drown the survivors.