Sinner takes us back into the captivating world of the Shiver Series, this time centering on Cole St. Clair, the charismatic and troubled musician who once found solace in his relationship with Isabel Culpeper. Now in California, Cole's mission is straightforward but far from simple: to reclaim the heart of Isabel, the girl who once fled from his tumultuous life, leaving him even more broken. Los Angeles proves to be a labyrinth of facades for Isabel, a place where she struggles to forge her identity away from the haunting past and the expectations of others. As both Cole and Isabel wrestle with their inner demons and the remnants of a bond that is as destructive as it is passionate, they are faced with the ultimate test of love: the ability to heal each other or the possibility of shattering beyond repair.