On a day that begins like any other, a violent earthquake strikes Los Angeles, plunging the region into chaos. Two strangers, trapped in a collapsed shopping mall, find each other amid the rubble and join forces to escape. Hampered by injury and darkness, they dig and claw their way through one crumbled store after another, emerging long after most have given up hope for survivors. The ordeal leaves both women shaken, but their shared triumph sets them on a life-changing course together, igniting a connection like neither has ever known. Anna Kaklis, whose perfectly planned life never included falling in love with another woman, is thrown for a loop, but she doesn't doubt her heart. Lily Stewart, abandones too many times by people she trusted, won't let herself believe that Anna's love will endure.