Following a personal tragedy, Jackie Kennedy seeks solace and a new beginning in a high-profile marriage, only to find herself in a complex love triangle with her new husband and his famous mistress. The narrative centers on Jackie's second marriage to Aristotle Onassis, exploring her fears of never loving again and her subsequent entanglement with Onassis's long-time lover, the opera singer Maria Callas. The story navigates the dangerous web of secrets, scandal, and lies that arise as both women vie for Onassis's affection, highlighting the high stakes involved in their pursuit of love. The novel is told from multiple perspectives, weaving together the lives of these three prominent figures.

The reception for 'The Second Marriage' highlights its status as a compelling and glamorous historical romance. Readers and critics alike praise its seductive narrative and its exploration of the lives of two complex, powerful women, noting their talents and flaws. The book is frequently described as heart-breaking, brilliant, and powerful, with an intensity and perception that captivates the reader. Its addictive quality and thorough research are often mentioned, with many readers finishing it in a single day, finding it an utter treat and a fascinating love-triangle story that leaves them enthralled and wanting to learn more.