In the wake of the 2004 tsunami, Emily, a young Canadian woman living in Spain, seeks to understand a tragedy in her recent past involving two friends, Gavin and Marcus, along the Santiago de Compostela pilgrimage trail. Emily recreates her friends’ actions from that fateful summer, piecing together what she knows of their fractured relationship—a connection that stretches back into their adolescence and an event that sent one boy to jail, while the other was allowed to go free. As Emily peels back the layers of the friends she thought she knew, she must also come to terms with her own role in the tragedy that summer and with the secrets that remain.