A singles cruise aboard the S.S. Alliance promises romance, escape, and second chances-until a violent storm strands the ship far from land. Then something impossible begins to happen. Passengers age at terrifying speed. Healthy bodies fail. Time itself seems to turn against them. Panic spreads as the death toll rises and no one can explain why. Miles away, a secretive ocean experiment pushes beyond safe limits, disturbing forces no one fully understands. As fear grips the Alliance, Captain Vincent-divorced, running out of time, and haunted by the son he may never see again-begins to suspect the truth is far more personal than science alone. The closer people grow to one another, the faster they seem to fade. Trapped between love and survival, the passengers must confront an unthinkable question: What would you give up to stay alive?