"I can’t tell you what happened. I can’t tell anyone."

It is a day that starts like any other day. It’s cold outside, but the sun is shining. It feels like a day that is full of hope. But two mothers’ lives are about to come crashing down when Samantha gets a call saying her 15-year-old daughter, Keira, has been hurt and is in a coma. And then Julia’s daughter, Grace, comes home covered in blood, refusing to speak.

Once, the two girls had been best friends and completely inseparable. So sweet-natured single mother Julia and PTA queen bee Samantha had formed an unexpected friendship, too. For years, the two families’ lives were intertwined. Barbecues, dinner parties, sleepovers for the children.

But eventually the girls had drifted apart, with Keira falling in with the popular crowd and Grace becoming quieter, more introverted, pursuing her dream of being an artist. And eventually their families stopped spending time together, the friendships just a memory.

But now their lives have collided again. And Julia is forced to ask herself: What could Grace be hiding? She can’t believe her little girl could have done something terrible. But she knows Grace is keeping a secret. And if it’s what Julia fears it might be, she could lose her fragile, gentle daughter forever.

And—as Samantha’s daughter fights for her life—both women will have to ask themselves, how far would a mother go to protect the child she loves with her whole heart?

This totally unmissable, heartbreaking, grab-your-tissues story is perfect for fans of Kate Hewitt, Diane Chamberlain, and Jodi Picoult.