Many consider Ricky Yamamoto to be a proficient and dependable divemaster, but the authorities think she's a loose cannon. Her friends wouldn't argue with either assessment. In the wake of the ARab Spring, disorder continues to reverberate throughout Egypt's Sinai Peninsula. December, though, piles on misery and mystery for Ricky and for her fellow divers. A bizarre disappearance and a devastating explosion have authorities baffled and clumsily pursuing what seems to be an aimless inquiry while Ricky goes rogue and launches her own investigation. When that leads to a dark and lonely place, she is left to question the path she has chosen.