When Detective Jonah Devonshire is transferred from Saynor to Portland, he never expected his new partner to be a Grimm.

It all begins with an anomaly, an Elsen who doesn't follow the program and attempts to rob a certain merchant's store. The world spirals into reality from there, and Zacharie must find out why.

Skyus Fletcher's life changed for the worst when he was caught in an explosion triggered by the meltdown at Star Labs. Months after fleeing Central City, he's returned to figure out exactly what he's been turned into. Barry and the team must decide if he's a friend or a foe before the city pays the price.