Every night, Kimberly dreamed of an island with mangrove trees. She woke up as the sole survivor of a shipwreck. It all started with the fishermen. One by one, they fell ill and died. When villagers of Tarnstead started to fall ill and act strangely after coming into contact with the sea, the others dissolved into panic. Their only answer? Kimberly, the one who was unscathed. What was lurking in the murky depths of the sea? How was it connected to the island with mangrove trees? And what was hidden in Kimberly's lost memories?