On her 47th birthday, Sydney Smith stands on a rooftop and prepares to jump. Sydney is a cartoonist and freerunner. Feet constantly twitching, always teetering on the edge of life, she’s never come to terms with the event that ripped her family apart when she was 10 years old. And so, on a birthday that she doesn’t want to celebrate, she returns alone to St Ives to face up to her guilt and grief. It’s a trip that turns out to be life-changing – and not only for herself.