Twelve floors, thirty meters high - two seconds of the free fly. You're on the edge - only one step separates you from the jump. The belay, the mountaineering equipment, the dead reckoning... you trust to your team completely. But when the love intrudes into the bet of two friends, intrigues are undermining the trust, and there stays only one step to the treason - then it's the time, when a human life's on the edge of the abyss.
—Nikita Vorozhishchev & Arthur Sukhonin