Set in present day, and seen from the perspective of several main characters, Sundowner, an action thriller, follows the lives of a group of frightened children, a troupe of scared adults, and other displaced individuals after a horrific event sweeps across England. Tally and her small group of youngsters find they are no longer surrounded by those that once protected them from monsters. Having escaped to see another day, the teenager takes it upon herself to help them find a way through their new world, one that is full of nasty surprises. Having survived a horrendous bus crash, Doug and his remaining fellow passengers must remove themselves from the broken vehicle that could ignite at any moment. After leaving the dead behind the small troupe try to make their way back to civilisation only to find the surrounding towns no longer exist. Thinking they are the last ones alive in the country, Karen, a petrified mother, suddenly feels there is more out there, namely her son. Doug feels the same, and together they go in search of the children they know are out there somewhere. Several other unsavoury survivors cross their paths, for both adults and children, and as the days pass they find the new world is not a nice place to live in. Everybody has their own agenda when the world stops being what the world had always been, and through sheer determination, all are on a new course in life. Tally has a gift, the gift of the sight, and with that in her possession she is able to find them a safe place to recoup. When they are finally reunited with their missing family members, something else tags along to start a process that brings the devastating events to the most tragic of endings.