When the brilliant diplomat Neil died on a dangerous mission, his childhood sweetheart, Charlotte, made a forbidden vow to the gods: her life in exchange for his. She believed her sacrifice would ensure him a long and successful life. However, fate is a cruel master. On the very first day after Charlotte's death, her wandering spirit discovers that Neil has not only survived but has already moved on, transferring his affection to another woman. Watching from the shadows of the afterlife, Charlotte realizes that the 'eternal love' she died for was as fleeting as ashes. A poignant tale of high-society betrayal and the high price of a sacrificial heart. Regret is the only thing left behind.