As London is submerged below floodwaters, a woman gives birth to her first child. Days later, she and her baby are forced to leave their home in search of safety. They head north through a newly dangerous country seeking refuge from place to place.
Starring Jodie Comer, Katherine Waterston, Joel Fry, Mark Strong, Gina McKee, Nina Sosanya, Benedict Cumberbatch, Alexandria Riley, Ramanique Ahluwalia, Neil Bell