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Some codes are written in the heart—and some secrets are worth debugging.

Software developer Nally Kim thought returning to Havenbrook for Christmas would mean hot chocolate, family dinners, and a much-needed break from Silicon Valley's relentless pace. Instead, she finds herself reluctantly recruited to save the town's struggling holiday tech fair, a quirky event tht showcases local innovation but desperately needs someone who actually understands modern technology to keep it from becoming a complete disaster.

Atlas Sterling appears at the perfect moment, offering investment expertise and an uncanny understanding of both cutting-edge tech and small-town dynamics. He's charming, brilliant, and surprisingly passionate about preserving community traditions—but there's something carefully polished about his story that sets Nally's debugging instincts on high alert. Every answer he gives raises two new questions, and she can't shake the feeling that his sudden interest in Havenbrook's little tech fair runs deeper than casual investment opportunity.

As they work together to transform outdated presentations into interactive holiday apps and turn the fair into something that could actually attract real sponsors, their professional collaboration becomes increasingly personal. Through late-night coding sessions fueled by Christmas cookies and heated debates about work-life balance, Nally finds herself falling for a man whose past seems as carefully encrypted as the most complex algorithm.

When she finally uncovers the truth behind Atlas's mysterious arrival—and his hidden connection to both her family and the town's future—she'll have to decide if some secrets are worth forgiving. Especially when the man behind the mystery might be exactly what she's been searching for all along.

A captivating mystery romance about digital hearts, analog feelings, and discovering that the most important algorithms are the ones that calculate love.