The kidnappers of Alexandre demand Central African funds as well as a unique diamond, the Heart of Central Africa, which would be in a bank safe. Elisabeth must quickly free the minister's capital and find the jewel. Prosecutor Djourou tries to stop him.

While Elisabeth discovers that her ethical banking project is at the heart of dirty trafficking, she is caught between the violent threats of the Central African minister against her and the peril that awaits Alexandre. Can she trust Paul to help turn the situation around?

Without the funds or the diamond, Elisabeth no longer has any hope of saving her brother. Luc's journalistic investigation into the links between Grangier and the diamond dealers gives him an unexpected clue. A violent underground struggle begins.

To prevent Paul from destroying what she took two years to build, Elisabeth is ready for anything. But prosecutor Djourou is one step ahead ... No one is safe!