Four girls wake up with no memory of the night before, and spend the rest of the show figuring out who they actually are. The mystery is real, but it's secondary, what matters is watching these four become a unit because they have to, because nobody else will believe them, because the alternative is dying alone. Red Garden earns its slow burn by making you care about each girl's specific damage before it reveals what's hunting them.

Strange suicides have been happening across New York. One morning, four girls from the same high school wake up tired and dizzy, unable to remember anything about the night before. At school they learn that one of their classmates has killed herself, and classes are called off for the rest of the day. Rather than heading home, the girls follow butterflies that only they can see, which lead them to a park. There a man and a woman approach them with a startling claim: all four of them died the previous night. The series is a psychological mystery drama with supernatural elements.