在小森(蝙蝠)忍者氏族的身后，天木、由一和千祖逃离了被积雪覆盖的隘口。他们必须穿过结冰的湖面，但他们在如此光滑的水面上的开阔位置使他们很容易成为蝙蝠的猎物——而且冰并没有完全结冰!同时，由一也学到了宝贵的一课:你不能相信忍者。
With the Komori (Bat) Ninja Clan behind them, Usagi, Yukichi, and Chizu flee over the snow-covered pass. They have to cross a frozen lake, but their position in the open on such a slippery surface makes them easy prey for the bats—and the ice is not completely frozen! Also, Yukichi learns a valuable lesson: you can’t trust a ninja.
