A forbidden bond... an unstoppable love. Leena Coughlin has the perfect life on paper: a surgeon husband, a beautiful home above San Francisco Bay, a daughter she'd die for. What she doesn't have is anyone who actually sees her. So she writes one anonymous letter to a stranger behind bars-just to feel less alone. She doesn't expect to fall in love with him. Dr. Michael Casspi is serving ten years for an act of mercy: helping his dying wife leave this world on her own terms. He has nothing left-no career, no freedom, no one waiting for him. Until a pink envelope signed only with the letter A starts arriving, and a woman he's never met becomes the only reason he wants to survive another day. Their letters become confession, comfort, and finally, an admission neither of them planned to make. But when Michael walks free, the connection that kept them both alive in the dark has to survive daylight-a marriage Leena hasn't ended, a daughter spiraling toward a tragedy of her own, and a husband who will not let go quietly. Some loves are forged in impossible places. This one will be tested in every way a love can be tested-and what's left standing by the end is the only thing that ever really mattered.