A mysterious artist ready to reveal her identity. A woman's search for the truth. And a decade-long journey of upheaval and meaning, set on the shores of Nantucket and Positano. Julia's publishing house is on the cusp of a breakthrough. Last summer, the enigmatic muralist known only as CAT reached out, asking Julia to publish her memoir: a work that promises to finally unveil the identity of the most talked-about artist of the modern era. It's the opportunity of a lifetime. But on the night of the book's launch, whispers spread: this so-called CAT might be a fraud. When the woman claiming to be CAT vanishes without a trace, Julia is thrust into crisis. Her career, her company, and her reputation hang in the balance. Desperate for answers, she sets off on a journey to uncover the truth behind CAT's real identity. What she finds is a deeper, more intimate story of art, love, and loss than she ever expected. As Julia pieces together the fragments of CAT's past, she's faced with a final question: is this a story she has the right to publish, let alone tell?