It is said saying the name of a person who is dead will bring his or her spirit back to our world. 

The story started with Cha Hakyeon a.k.a N along with his best friends went back to their home together. Then, his two friends, Hoya and Baekhyun getting into the fight. One of the charms was given to Hoya rolls on the middle of street road. So, he decided to take it back because the charm keychain symbolizes their friendship and he thinks it would bring good luck to them.

Hakyeon was relieved to finally get his hands back on that fallen charm, now all he had to do was give it back to Hoya. But... 

What will happen next?