Gustavo is a ghost who can do all kinds of spooky things—glide through walls, float objects, and shine in the dark. He also plays the violin beautifully. But there’s one thing that’s really hard for him: talking to the other monsters. Gustavo is painfully shy, and more than anything, he just wants a friend. So one day, he does something truly brave—he invites everyone to his violin concert at the Day of the Dead party. Will anyone come? And will Gustavo finally be seen?