Three little girls have escaped from a prison-like facility, but they aren't safe yet, as the vehicle in pursuit is unwilling to let them go so easily. One of the girls points to the city of Tokyo across the bay, and tells the other two, named Lisa and Hiroko, that there are people there who can help them. Despite the rough seas in front of them, death is apparently a better fate than what they just left behind, and they jump in. It turns out that the third girl instructing them to jump was Yuki, whose bubbly demeanor belies this troubled past. The smile leaves her face, however, when she…