Plot Ember is an underground city, lit only by electric lamps, whose inhabitants have no mobile light sources — including even fire. The darkness beyond, they believe, extends forever. But their power supply is running out. Ember is falling apart. And young messenger Lina (Ronan) and pipe worker Doon (Treadaway) are looking for the exit. Verdict With Ember’s hydro-electro-punk charms, Kenan’s convinced us he’s one of Hollywood’s most exciting (and excited!) visualists. But on the evidence of this, his storytelling skills still need honing.