Alice, a single mother who is more dedicated to her work as a genetic engineer than to her teenage son Joe, develops a new variety of flower that is supposed to have the ability to make its owner happy thanks to its special chemical properties.
Sarah seems to have found her calling working in a Liverpool care home where she has a special talent for connecting with the residents. Then, in March 2020, the Coronavirus pandemic hits.
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.
