A woman visits a friend with terminal cancer. Brilliant, strong-willed and alone, the friend, facing death, makes a momentous request. Will she accompany her on a holiday where she will, without warning one day, take a lethal pill to end her life on her own terms?

Shaken and grieving, she finds the strength to agree. What follows is an extraordinary story - profound, surprising and often funny - of a lifelong friendship given the ultimate challenge; to witness its end.

Utterly of our moment and timel