Бедные смеются, богатые плачут

What is Бедные смеются, богатые плачут about (plot, summary)
Katya accidentally gets a job at the estate on Rublevka. She will be introduced to a completely new world with its own laws, rules and intrigues.
Katya accidentally gets a job at the estate on Rublevka. She will be introduced to a completely new world with its own laws, rules and intrigues.