The newly-bred ninja studied in the Shaolin monastery for ten years. All this time he was divorced from the outside world, he was engaged only in meditation and mastery of fighting single combat. for this time he comprehended the school of cobra, earned a black belt, which can be proud of the full right. But now it's time to return home to the native village of Hero Hero, which is located several tens of thousands of kilometers from the monastery. The road is not easy, only mountains and deep ravines are waiting ahead. Cross a wide cleft by using a homemade mahogany road. Measure the distance from one point to another and build a road.