Mining for tin in deep, dangerous trenches is the only life that Tono has ever known. Worked to the brink of exhaustion each day, his only escape is in the precious moments when he reads his dad's old comics. In a world of heroes and superpowers, he can forget the terrifying mining pits. But an underwater avalanche, a glimpse of something bright red in the sandy seabed, and a canny sidekick are about to transform Tono's life forever...