The Princess and the Echo(1978)

Original title: Принцесса и эхо

King Lorenzo was in trouble: the echo had disappeared from his kingdom. It all happened because his neighbor, King Florindo, had ordered the mountain — the one that reflected the echo — to be destroyed. The quarrel quickly escalated, and both kingdoms prepared for war. King Florindo’s son took command of his father's army. But King Lorenzo had no sons at all — only three daughters. And then...