One day they lived to boys but they weren't the type of boys you see everyday in fact these boys were cups and they were brothers the older brothers name was cuphead and the younger brothers was mugman and they were just having a normal day in inkwell isle but then they happen to stumble up on something and that something happen to be the devil's cosino cupheads eyes widen as if he saw a £million right in front of him and said in exitment "come on mugs let's go there" mugman didn't dare to refuse his older brother so he tagged along with him