Finding your soulmate is supposed to be perfect. For Amelia Collins, it was anything but. 

Everything Ami thought she knew about fate is about to unravel. She believed the worst thing to happen would be her prom night—the fight that ended her decade-long friendship with Noa Mitchell. She was wrong.

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Weeks later, the CCA publicly announced that Noa and her soulmate, Christopher Hawthorne, had been kidnapped by anti-Mark radicals. 
As the summer winds down and her Countdown Mark hits zero, Ami collides with Dean Abrams... who doesn't have a Mark at all. Dean was born before the world's first Marked child and trusts only the science he knows: soulmates aren't real, and the CCA's "proof" is political theater at best. But Ami feels the truth in her bones—Dean is hers. 

Their clash of conviction turns into uneasy cooperation when Dean's work in biotech leads him to accidentally uncover classified CCA files—evidence suggesting that Noa and Christopher haven't been kidnapped at all, but are on the run from the Agency itself. 

Drawn together by danger as much as connection, Ami and Dean find themselves tangled in the CCA's most dangerous secret yet—Project Genesis, a program that could redefine fate itself. Every answer they find raises more questions. Every step closer to the truth makes them a bigger target. 

Together, they'll have to navigate suspicion, science, and the undeniable pull between them before the Agency silences them for good.