Three interconnected couples grapple with the onset of a global bioweapon disaster that threatens human extinction. Len, a scientist, and his wife Mia try to balance their personal turmoil as they confront critical life decisions. Andy and Esther navigate the strains in their marriage while trying to conceive a child amidst the chaos. Meanwhile, Erik and Anna, a young couple embarking on a new chapter together, face unforeseen challenges as the dire situation escalates.

As the biological threat intensifies, each pair struggles with their own fears, desires, and moral quandaries. Their lives become a tapestry of love and loss, showcasing humanity's resilience. The story explores how their relationships are tested by the impending apocalypse, highlighting the fragile nature of life and the enduring power of hope in the darkest times.