The average citizen Dong-won and his family move into a house bought after years of hard work. Filled with happiness, he invites his colleagues for a housewarming party, but the heavy rain during the night before creates a gigantic sinkhole, and in a mere minute, it swallows up the whole house and the people inside. Hundreds of meters down the hole, Dong-won, his neighbor Man-su, and the unfortunate guests must find their way out. Rain starts to pour down, filling the sinkhole with water, and they’re running out of time.

• Man-soo: Cha Seung-won
• Dong-won: Kim Sung-kyun
• Manager Kim: Lee Kwang-soo
• Eun-joo: Kim Hye-jun
• Seung-tae: Nam Da-reum
• Director Seo: Kim Hong-pa
• Fire chief: Ko Chang-seok
• Yeong-e: Kwon So-hyun
• Ms. 301: Kim Jae-hwa
• Min-jun: Na Chul
• Grandma: Jung Young-sook
• Hyo-jung: Han Hye-rin
• Mother: Jeong Yun-ha
• Manager Jung: Lee Hak-joo
• Grandpa: Jang Gwang

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• Editor: Shin Min-kyung
• Director: Kim Ji-hoon
• Executive Producer: Lee Soo-nam
• Sound Supervisor: Lee Sung-jin
• Costume Design: An Ji-hyeon
• Original Music Composer: Kim Tae-seong
• Writer: Jeon Cheol-hong
• Props: Yu Cheong
• Producer: Kim Do-yeob
• Set Decoration: Kim Nam-ho
• Props: Park Jun-yong
• Makeup & Hair: Park Ye-ri
• Director of Photography: Shin Tae-ho
• Production Design: Kim Tae-yeong
• Martial Arts Choreographer: Kim Chul-jun

Credits: TheMovieDb.