In the midst of a heart attack, Anna knocks on her neighbour's door. Sam answers. But when the paramedics arrive, Sam collapses - he's taken an overdose. It's an unconventional start to a relationship. And these are not your conventional soulmates. Anna, who has given up on love, is defensive and closed off. Sam, a newly separated father-of-two, is reactive and emotionally vulnerable. But as this strange love story unfolds with wryly observed wit and warmth, could these deeply flawed individuals - both at a time in their lives when change is difficult and rarely expected - influence each other for the better?