Two brothers locked in a sibling rivalry wrestle for command of a massive nuclear submarine, The Absolution, in a near future irrevocably altered by climate change. Chief Science Officer Liana Pearson finds herself not only caught between the Wilder brothers but drowning in her fear of the surface world. When something alien infiltrates The Absolution and upends the balance of power, Liana is left with only two deadly options--reaching the toxic surface world or steering the sub into the unforgiving abyss and crush depth-Breathe Deep!