Grayson Caballero sees the glass half-empty. Born with a life-threatening heart defect, he's been living on borrowed time. The uncertainty of tomorrow makes him push people away, helping Grayson to avoid any real commitment.

Then he meets Reid Sullivan and falls madly in love. The two work together at the Wold Collective, Grayson as a project manager and Reid in HR. They even live in the same apartment complex. But Grayson continues to keep his distance, despite their obvious attraction. And Reid's not interested in waiting around.

When Grayson collapses at a basketball game, Reid learns he's been keeping secrets from her. Now his life hangs in the balance...and a stranger from Boston holds the key to his survival.

Nadia Karlsson makes a life-changing decision after her husband, Rafe, is involved in a tragic accident near Harvard Square. Her choice will unwittingly alter the course of Grayson's future--and tie his fate unexpectedly to her own.