Traveling entertainers Yin and Ning are very close sisters.
Yin cares for her armless sister as they travel between villages, putting on performances of swordplay and dancing.
When they arrive in the ruins of a village, they find a mysterious bamboo writing strip.
The strip glows, and from within it a strange girl and a single sword appear.
Meanwhile, in the Taibai Empire bent on conquering the Shenzhou region, a boy name Zhao is working as a slave.
Zhou, who has been teaching himself engineering, meets a young girl one night.
I taught myself engineering 
by tinkering every night.
تعلّمتُ الهندسة بإصلاح الأشياء كلّ ليلة
Ich habe mir das Tüfteln
jede Nacht selbst beigebracht.
Aprendí ingeniería por mi cuenta
cada noche.
Aprendí ingeniería por mi cuenta
cada noche.
J’ai appris la mécanique
en trifouillant tout ça chaque nuit.
Ho imparato l'ingegneria da solo
armeggiando ogni notte per passare il tempo.
Eu aprendi engenharia sozinho,
brincando com essas coisas toda noite.
Я научился этому, когда возился
с деталями по ночам.