When Darkness Comes (The Big Four Fanfic)

This story takes place after Jack becomes a Guardian, before Merida turns her mother into a bear, before Rapunzal leaves her tower, and after Hiccup defeats the Red Death.
Pitch is back, and stronger than ever. In order to stop him, Manny calls three new people to help Jack Frost.
The four teens hate the idea of teaming up. Rapunzal wants to go back to her tower, Jack tries to do everything on his own (which, of course, ticks off the other three), and Merida and Hiccup can't seem to get along.
How will this so called 'team' defeat an enemy that not only learns from his mistakes; but also uses one of the most powerful things in the world: Fear.