The world ended generations ago.
At least, that’s what they were told.

For twenty-four-year-old Mara Vale, life inside the Vault is all she has ever known—a vast underground sanctuary where every memory is monitored, every movement is recorded, and every citizen is conditioned to believe the surface above is toxic, dead, and forever unreachable.

The system is perfect.
The truth is protected.
And curiosity is dangerous.

But when Mara discovers impossible inconsistencies buried deep within the Vault’s restricted systems, she begins unraveling a secret hidden for generations: the world outside may not be dead at all.

As surveillance closes in and the people she trusts begin to turn against her, Mara is forced into a deadly race through forbidden levels, erased archives, and the darkest corners of a carefully engineered lie.

What she uncovers will shatter everything the Vault was built to protect.

Because the greatest threat to humanity was never the world above—

it was the truth buried below.

A gripping dystopian thriller packed with psychological suspense, shocking twists, and a jaw-dropping finale, The Vault is perfect for fans of Dark Matter, and The Silent Patient.