The Sexy Ghost was an undead being that haunted an old facility. Markiplier, a thief, was sexually attracted to her, to the point of letting her kill him. She leaves red eyes around her lair, Mark collecting many of them.
After Mark was contacted by an unknown associate, he was sent to the Ghost's home to steal twenty bags of goods. She attacked him frequently, Mark frequently trying to escape or seduce her. Mark eventually got all of the loot and escaped.
Mark returned to the facility after he was contacted again, and to his dismay, discovered that his "baby" was somehow turned into a floating, fanged head. This caught him so off guard that he was killed by the head while escaping, though he eventually collected all the loot and left. It is unknown what happened to the ghost afterwards.