AONAGI

The sea kept their world hidden for almost four centuries. Now it threatens to destroy it.

Following a devastating earthquake and tsunami, marine biologist Emi Takahara joins a scientific expedition to assess the damage around a remote Japanese island.

Beneath the water, her team discovers something extraordinary.

Stone streets. Submerged buildings. The remains of a settlement believed lost in 1638.

But the ruins conceal an even greater mystery.

Someone is still using them.

When Emi follows an unfamiliar swimmer through a dangerous underwater passage, she discovers Aonagi: an entire community of more than six hundred people living in a vast network of caverns beneath the island.

For generations, its inhabitants have survived through ingenuity, sacrifice and strict communal rules. They have preserved their language, their history and a promise that someone from the surface would one day return.

Now the surface has found them.

But the reunion is far from the miracle some imagined.

As old secrets emerge, a frightening illness begins spreading through the hidden settlement. Meanwhile, the earthquake has destabilized the island, and seawater is steadily invading the tunnels that have protected Aonagi for centuries.

With time running out, the community fractures over its future. Some believe salvation lies above. Others fear the outside world will destroy everything their ancestors fought to preserve.

Caught between two societies, Emi must confront her own mistakes and a question no scientific instrument can answer.

When saving a people means changing their world forever, who has the right to decide?

AONAGI is a gripping, thought-provoking adventure about survival, discovery, hidden history, freedom and the extraordinary courage required to face an uncertain future.