In the murky depths of a waterlogged Sydney, the Floodline creeps ever closer, consuming entire neighbourhoods in its advance. The city teeters on the brink of submersion, a constant reminder of the looming threat of climate change. But there is life still in the city, and in any city there always crime. Sarayu, a hardened police officer, long desensitised to the trauma experienced by everyday people finds herself thrust into a new nightmare when a young girl goes missing. As the impending storm looms ominously overhead, Sarayu must navigate the treacherous waters of corruption and danger to rescue the girl, before the storm bearing down rips the whole city apart.