Zero's Cafe

Bailey, a 23 year old, currently started working as a barista for newly established cafe. Youngseo was the former owner, but, suddenly, she called in sick for who knows how many days. Ever since she left, Bailey forgot she worked with her in the first place. Bailey starts to suspect Annie, her colleague, of plotting something since she was the first hired employee, but there isn't enough evidence for jumping to conclusions so soon.

What could be the cause of Youngseo's sudden departure?....