A haunting melody drifts through the void, an impossible transmission from the edge of our solar system. The world listens in silence. The United Nations sends six of its brightest minds-scientists, engineers, and a reluctant linguist-on a mission to unravel the mystery. Their destination: Neptune's orbit. Their journey: three years in a dreamless coma aboard humanity's most advanced spacecraft. But when they wake, nothing is as it should be. The ship's systems glitch and fail. Their instruments scramble. And as they hurtle past the Kuiper Belt, thrown off course by an unseen force, they come face to face with something they never expected-watchers. Three alien vessels lurk in the dark, observing their every move. With their engines dead and oxygen dwindling, paranoia grips the crew. Time is running out, and survival is uncertain. But for Tommy Fletcher, the team's hesitant linguist, the true battle is within. Labeled fragile, dismissed as weak, Tommy is the last person anyone expects to rise to the occasion. Yet as the unknown looms and fear takes hold, he may be the only one who can decipher the truth behind the Siren's call. But is the signal a greeting... or a warning? And by answering it, have they sealed humanity's fate?