Mastroanni plays a mandolin player who, while trying to cover his senile father's gambling debts, is sent to perform a serenade at a high rise building and witnesses a shootout and a man being thrown from a window to his death (the first of several falls from windows that the beleaguered hero witnesses). He gets mixed up with a famous conductor and his gorgeous wife as well as with the conductor's beautiful daughter-in-law. The whole thing involves a confusingly intricate blackmail plot and a horrible secret dating back to World War II.
In the future, one can achieve immortality by obtaining a mechanized body. Orphaned, young Tetsuro hitches a ride on the space train Galaxy Express 999 in the hope of obtaining a cyborg body to avenge his mother's death.
Egon plans to exploit knowledge gained during his latest term of incarceration. By stealing the unmanipulated financial records of DanInvest he obtains the majority of the stocks in the department store Magasin du Nord, just in time for their closing sale.
During the World War II, the prisoners of a German camp in a greek island are trying to escape. They don't want only their freedom, but they also seek for an ineffable treasure hidden in a monastery at the top of the island's mountain.