A powerless noblewoman. A disgraced prince. A marriage neither can afford to trust.

Lady Elowen Vale has failed every royal joining test. In a kingdom where marriage awakens magic, her silence marks her as useless to the crown and vulnerable to anyone who desires her family’s power.

Then her dead brother leaves behind one final command: find Prince Caelan Ardyn.

Exiled for treason and blamed for her brother's death, Caelan is the last man Elowen should trust. Yet the secret buried beneath her ancestral home can be uncovered only by a sworn pair. Their solution is a temporary marriage, negotiated one careful clause at a time. No surrendered property. No unchosen magic. No vow that cannot be broken.

But when the official ceremony rejects them, a different power answers freely.

Their impossible bond exposes a truth the Keeper of Royal Vows has hidden for generations. With the crown closing in and Valehold under siege, Elowen and Caelan must decide whether trust is merely another weapon—or the only force strong enough to remake their kingdom.

Their borrowed vow was always meant to end.

The choice growing between them could change everything.

A closed-door enemies-to-lovers romantasy filled with marriage magic, royal intrigue, dangerous secrets, and a complete romantic happily-ever-after.