The Three Unpredictable Sisters

Forty years ago, after struggling with long-term youth unemployment, three sisters took part-time jobs as human test subjects to make a living. Due to unforeseen side effects, their faces remained permanently youthful—frozen in their twenties.
Now in their sixties but still looking like they are in their twenties, they run a B&B (Bed and Breakfast) called “Versailles” in Seoul. However, after being scammed out of 100 million won, they face eviction unless they can repay the money within a month.
One dawn, a once-in-200-years comet collision brings a meteorite carrying a mysterious liquid infused with alien bacteria crashing near the B&B (Bed and Breakfast). Soon, a series of suspicious guests gather: a mysterious Japanese YouTuber, a North Korean undercover agent, a prison escapee, and even police officers.
An emergency broadcast announces that aliens disguised as humans have infiltrated the B&B (Bed and Breakfast)—and that a reward of 200 million won will be given for capturing them.
Driven by the chance to recover their lost money, the sisters begin the hunt. As suspicion spreads among the guests, tension escalates. In their desperate attempt to save the B&B (Bed and Breakfast), the sisters’ own shocking secret is finally revealed.