In the turbulent summer of 1968, four high school friends make a pact that will change their lives forever.

As the Vietnam War rages overseas, four friends make a vow. For the next two weeks, they will live for each other and for each day. Then, at the end of the two weeks, they will sacrifice themselves on the altar of their friendship.

Loyal Kay, our narrator, dreams of being an artist and escaping her stifling family - the stepmother and stepsister she gained after her mother's early death, and the father she no longer feels she knows. As she struggles with her weight, her schoolwork, and her longing for her mother, she feels loyalty only to her three friends, determined to keep their group together at any cost. Brilliant, charismatic CJ appears to have everything - though even those closest to him can't see him as he really is. Steady, quiet Saint wants to do right by everyone, trying not to let his emotions destroy himself and those around him. And beautiful Vera's family secrets are too dark to share, even with her closest friends; caught in a web of family dysfunction, she can only hope the others won't get tangled up in the danger she senses around her.

In the two-week span in which the novel takes place, during the summer before their senior year of high school, the lives of Kay, CJ, Saint, and Vera will change beyond their expectations, and what they gain and lose will determine the novel's outcome. Once, in Lourdes is a gripping, haunting novel about the power of teenage bonds, the story of four young people who will win your heart and transport you back to your own high school years. As the heady 1960s shift the ground beneath their feet, all of them must face who they are - and who they want to be.