They live under our feet... Si-Hwan Kim decides to stay at Da-Bin Park's house for a while. Little does he know that unidentified ants dwell below... Through an experiment, a monster-like ant creature is born and begins to kidnap people. Will Si-Hwan and Da-Bin, who are now caught up in the incident, be able to escape after twists and turns?

(Source: WEBTOON, edited)