77Danui Bimil
Genres: Action, Adventure, Drama
Type: Movie, Episodes: 1
Aired: Jul 23, 1978
Source: Radio
Rating: G - All Ages
Synopsis:
Sang-ho and Sun-ja are kidnapped by someone and live in brutal abuse while performing acrobatics in a circus troupe called the "77th Dan". 

One day their uncle comes to visit them and they try to escape, but when Sun-ja is captured by the circus, a black hooded person, the object of Japanese fear, suddenly appears to help them...

(Source: Daum; translated)