Detective Dylan Scott thinks cruising well above the Arctic Circle in November is nothing short of madness. He has zero interest in seeing the elusive aurora borealis, but agrees to the Norwegian holiday to keep his wife and mother happy. At least the biggest problem he'll have to deal with is boredom. But that boredom quickly dissipates when the unpleasant elderly woman in the neighboring cabin is found dead.
Everyone thinks Hanna Larsen had a heart attack. Everyone except Dylan. Dylan is convinced there's a killer aboard the Midnight Sun-a killer who may strike again...