Luxurious cruise liner swimming to the banks of Norway. Merry dancers. Ideal trip.When a chance to accomplish a cruise falls out journalist Ло Блэклок, she grasps at this possibility, to write an excellent review and rise on a quarry stair. But all goes not so as she planned.Waking up at night, Ло hears a strange sound, as though overside threw out a body. Running out on a balcony, she sees blood on glass nearby cabins № 10 and causes a guard. But records show: nobody called at this cabin, and all passengers onboard. Ло forces to confess that, maybe, made a mistake - or appeared in a trap on one liner with a killer.