The TV series "The Business Plan of Happiness" is a detective story based on the novel by writer Lyudmila Martova. The main character, entrepreneur Pavel Molchanov, faces an invisible and cunning enemy. An unknown villain decides to destroy his entire life. He sends evidence of his infidelity to his wife, and a letter to his son and daughter revealing that they are adopted. Additionally, someone kidnaps his collection of netsuke and sets up a car explosion. The only person on Molchanov's side is his loyal assistant, Vera.