After the showdown between Maven, Cal and Mare, the latter two are on the run from the new Silver King and on a mission to find other Newbloods to help overthrow the government. Without knowing who she can truly trust, Mare finds herself shifting allegiances and allies to ensure her win against Maven, once her friend but now a crazed king.
There are two sorts of people who coexist in this new world: Reds and Silvers. The former are humans who bleed red and have no special ability. They are slaves to the other class and have no way of escaping their fate. Silvers are a special breed of superhuman that have special powers and who rule over the lower class with an iron fist.