The Boy with the Big Black Dog

The series "Achterbahn" is about friendships and the handling of difficulties and problems from children's everyday lives.

A creature bearing the ominous name "Mishap" is hot in pursuit of an unfortunate lumberjack and eventually decides to live with him. It soon gets bored, however, and asks the lumberjack to hand it over to the rich merchant Habermoos. Habermoos manages to sell Mishap to the king, although he is being attacked by robbers. The king is bankrupt and threatened with war by other countries. Young Michael has to go to war for the king. The creature tries to secretly join him. When Michael gets hold of the situation, he manages to get rid of Mishap once and for all. After all, he has more important things to do. At the last moment, he prevents his girlfriend Kathrin from getting married to the pompous merchant Habermoos.

On the way to summer camp, eleven-year-old Lena develops a crush on Wolfgang, but Antonia is interested in him too. Although Lena and Wolfgang grow closer to each other, camp director Eichler disapproves of their relationship and tries to split them up by assigning them to different groups. The conflicts escalate until one night, during a disco event, Lena suddenly runs away.

For the "Festival of good ideas" that is to take place in their residential quarter the musically enthusiastic young Bum wants to rehearse a music show along with his friends. With pans, cans, hooters and other junk they make music. Some adults get angry about that. Others like the second-hand dealer Dohlenei and Mr. Kling from the symphony orchestra help the children to make their fantastic idea come true.

The children’s film is based on Wenjamin Kawerin’s short story "Leichte Schritte". It centers on the ten-year-old Peter who is in love with his classmate Una. Much to his despair, however, Una is attracted to another classmate. Peter escapes into a dream world in which he spends a wonderful time with a girlfriend made from snow. As springtime arrives, the snow girl is threatened by the thaw. In order to preserve their friendship, Peter locks his "Una" into a cold store.

Twelve-year-old Isabel and her mother, who was a famous political singer, had to escape Chile after the 1973 military coup. Isabel’s father stayed behind fighting in the underground. For six years, they have lived in a new apartment building in East Berlin. At first, the neighbors made an effort to welcome them, but later became more distant. Isabel does not feel at home in the strange country. Not even her friendship to Philip, the neighbors’ son, can change her mind. Almost every day, Isabel sits on the stairs waiting for a letter from her father, from whom she has not heard for many years.