Prince Nicolo, a boy who feels distanced from his family, is close to becoming 18 blue moons and a man by law (though he is 15 in the rest of Naples). However, before he can become a man, an unexpected death takes him by surprise and he is forced to see the shadows of the world he lives in. A masked knight who is known for his ominous backstory, suddenly makes an appearance to help with the unexplained deaths in the kingdom, and with this, comes an unfamilair love that Nicolo did not know was humanly possible.