This is one of the most recent skins in the item shop; it's a part of the Grim Medicine set and is a little more expensive than the skull set. However, it is definitely one of the coolest, eeriest Fortnite skins out there.
The plague doctor character is 1,500 V-Bucks. His mask has a crow-like beak -- reminiscent of medieval plague doctors -- and his eyes glow green. He also wears an apron and has medicine vials on his belt.
This one appears to be limited, so you'll want to grab this one before its gone from the shop.