A professor who found out a formula to make diamonds from oil is killed in Tehran and his nephew who is a spy is sent to Tehran by Interpol in order to find the formula.

Aghdas looks for a brave man who would avenge her brother's murderer. When she encounters Heydar, he marries her and promises to do so.

A-Seyd Kazem, the guardian of the neighborhood, is the lover of his sister-in-law, Zinat. He rejects Zinat's suitors, including Teymour, until Davoud, the son of his old friend Jalal, comes to Tehran from Shiraz and becomes interested in Zinat.

Abbas, known as "Abbas Chakhan," is a driver’s apprentice who is alone and has a stutter, constantly weaving tall tales. One night, he accidentally meets Banafsheh, who has ended up in a notorious neighborhood in search of her dreams, yet she is still determined to free herself from that place and have a home of her own. Abbas promises Banafsheh that he will help her. After she learns that Abbas has been imprisoned due to a small debt, she borrows money from a loan shark named Mohammad, known as "Mohammad the Dagger," to free Abbas.

An American intelligence agent travels to pre-Islamic Revolution Iran to try to thwart a power-mad European baron from using a stolen cruise missile to destroy an unspecific target in that country.