After a career-defining moment at the Hague, renowned primatologist and archaeologist, Freya Blue, wants nothing more than to lay low in her beloved Congo. However, upon her return, she discovers that her sister, Jules, has been kidnapped by an unscrupulous diamond hunter named Hugo Lacort. Lacort is on a fool's errand to locate the infamous treasure of Queen Isolde, and Freya is the only one who can help him find it.

In exchange for Jules' safety, Freya agrees to lead Lacort and his men to the treasure. Before long, the jungle comes alive with Isolde's ancient curse that threatens them at every turn.

Action and suspense combine with ancient mysticism to grip the reader from beginning to end in this fast-paced adventure, set in the wilds of the Congo jungle.