To understand how the flood, the time loop and the Emotion Engine connect, here is the ending of The Great Flood explained.

Seemingly overnight, things are happening that have the potential to result in an extinction-level event for movies as we know them.

A South Korean sci-fi disaster film has soared up the charts since dropping on Netflix last week. Although the streaming service had been releasing a string of festive flicks throughout the month in the lead-up to Christmas, The Great Flood offered viewers something decidedly less jolly.

The Great Flood stars Kim Da-mi and Park Hae-soo as characters fighting for their lives after a massive flood envelops Seoul, South Korea. In addition to trying to find safety, Gu An-na (Da-mi) must also search for her son, Ja-in (Kwon Eun-seong), who got lost in the chaos of the flood.