A computer genius must rely on the estranged lover who broke his heart to find his missing sister. Ryan Barton, a brilliant but guarded computer expert, finds himself in a desperate situation when his sister disappears. The only person he believes can help is Sasha Tereschenko, a missing-children expert who vanished from his life two years prior after a passionate night. Ryan must confront his past and the lingering pain of Sasha's departure to save his sister, risking his carefully protected heart in the process. Sasha, an expert in finding the lost, is driven to help Ryan despite her own reservations about their past and Ryan's seemingly carefree nature, knowing that falling for him again could lead to further heartbreak.

The premise sets up a classic romantic suspense narrative, pitting a logical, tech-minded hero against a determined, emotionally complex heroine. The story appears to focus on the high stakes of a missing child case intertwined with the rekindling of a past romance, suggesting a blend of thrilling investigation and emotional development. The author's background in romance and suspense genres indicates a likely pacing that balances tense moments with the exploration of the protagonists' relationship. The narrative seems designed to appeal to readers who enjoy strong romantic leads facing external dangers and internal emotional conflicts.