All the theories I've collected a thread:
(Disclaimer: This thread involves usage of ai, if you're anti-ai image generation I apologise first and foremost.)
1. The 10:09 o clock.
It makes sense, as you can see heeseung was invisible In his mv so maybe it's because he was trapped in different timeline and then enhypen went back to find them and the way heejayke said if they had any power it would be "going back into the time" or "stopping time"
Enhypen is travelling the past to find heeseung and this album is giving border:day one vibes /given and taken.
Which was their first album.
π They travelled all their eras to find heeseung and this is the last one.
They are so finding heeseung back π
The Missing Piece of THE SIN : BLISS?
Heeseung's disappearance, Selene's trap, Sooha's tracker, the shattered glass, the missing black smoke... and how BORDER : CARNIVAL, THE SIN : VANISH, and THE SIN : BLISS might all be connected.
Here's my full theory...β
Selen isn't in the scene with them. Last time, sunoo was in the house with selen but this time she's alone? Or..with heeseung? We know that selen loves heli but heli loves sooha; what if selen lures heeseung in the house?