Heather (Naomie Harris), trapped in a cold and loveless marriage, tormented by frustration and an unsettling wasp infestation in her home, decides to reach out to Carla (Natalie Dormer), a childhood friend she hasn’t seen in decades, now seven months pregnant and struggling to get by as a cashier. What begins as a simple coffee between old acquaintances quickly turns into a shocking and perilous proposition: Heather offers Carla a substantial sum of money to kill her husband, Simon (Dominic Allburn). Yet the reasons behind this chilling request run far deeper than they first appear.