The Orpheus Signal

The truth has surfaced. Now the dead are transmitting.
The Argus is gone, resting at the bottom of the sea. Her wreck should have marked the end of the operation and its lies. But the secrets sealed inside her hull have refused to drown.
Across the freezing waters of the Eastern Channel, an automated transmission cuts through the night. The signal is weak, irregular and moving. Its encryption belongs to a classified system meant to have been destroyed. Its identifying signature belongs to Raul Diaz—a man who should not be transmitting at all.
For Natalie, the impossible message destroys the fragile peace she fought to rebuild. Diaz belongs to a past she believed had released her, and the signal carries more than coordinates. It proves someone is still operating inside the ruins of Kasem’s network. Someone knows what happened aboard the Argus. Someone knows what Natalie survived, what she concealed and what she may yet be forced to expose.
Captain Harriet has no ship, no command and no intention of walking away. She survived the sinking of the Argus, but survival has brought no answers. The final tremors beneath her feet were wrong. The timing was wrong. The official account was worse. While investigators reduce the loss of her vessel to acceptable failures, Harriet remains certain of one thing: the Argus did not die by accident. When she learns of the transmission, certainty becomes pursuit.
With no official protection and no clear idea who can be trusted, Harriet and Natalie follow the signal east. Each transmission draws them farther from safe waters and deeper into a hidden conflict fought through ghost vessels, erased identities, altered records and operatives officially dead for years. Every ally carries a secret. Every mile brings them closer to a truth powerful people are prepared to kill to keep submerged.
Far from the open sea, Eve Halston makes a decision that changes the scale of the threat. From a hidden command centre, she activates a long-dormant communications network: a new Orpheus channel. Across borders, forgotten assets stir, coded instructions move and buried identities return to life. Operatives removed from official history begin answering a call no government will admit exists.
But the channel does not awaken alone. Orpheus 7 has returned.
Born from the remains of Kasem’s final operation, the hunter has one purpose: eliminate every surviving link between the Argus, the Orpheus network and the truth behind the signal. Patient, disciplined and almost impossible to trace, Orpheus 7 closes the distance, removing witnesses and cutting away every route to safety. Harriet and Natalie are trapped between two forces—one trying to control the dead, the other determined to silence the living.
As the transmissions become more urgent, the search becomes a race across hostile water. The signal is changing. Its source is moving. Hidden inside its repeated checksum is a warning neither woman understands until it is almost too late.
The closer Harriet comes to the truth, the more she risks losing the last pieces of the life she once commanded. The deeper Natalie is drawn into the network, the harder it becomes to separate duty from guilt, loyalty from desire and the woman she was from the woman she has become. Between them lies a bond forged under pressure and strained by secrets neither has fully confessed.
To survive, they must find Raul Diaz before the Orpheus channel closes, before Orpheus 7 reaches him and before the forces hunting them turn the Eastern Channel into another grave. Because the Argus was never the end. It was the first message.
Some secrets are too deep to stay buried. Others are deadly enough to kill twice.
The dead have found their voice. Now someone must answer.
The Orpheus Signal is Book Three in the Collision of Tides series.