The movie is about a building going down a 500m sinkhole and the attempts to rescue the tenants.

I was mostly disappointed because the effects looked so fake and the story was very unrealistic. The first half focused on the main characters yet I didn't feel connected with any of them. The father-son relationship was strained but i didn't know why, except for the son disapproving the dad. I did like Kwangsoo's character and his potential romance with his colleague when they get out of the sinkhold. Still I finished because I wanted to know how they will be rescued and it was nothing spectacular, just a group of tenants who were unlucky and at the wrong place at the wrong time.

Rating: 7.5/10