Tania is a young Bengali living in Calcutta in the 1980s. Hated by her mother and shunned by her peers, she seeks solace within the pages of Russian books she reads in her mother tongue, Bengali. In a bookshop, she stumbles upon a Russian book published in the USSR in the 1920s by Raduga, a once-prestigious publishing house that was closed in 1930 on Lenin’s orders. Intrigued by the mysterious publisher behind the book, Tania perseveres through numerous frustrating detours until she finally tracks down Adel, the publisher's octogenarian daughter residing in a St. Petersburg nursing home, and corresponds with her. Through this connection, she ultimately uncovers the tumultuous destiny of Raduga’s founder, a Jewish journalist named Lev Moisevitch Kliatchko, who narrowly escaped execution under Stalin thanks to the intervention of Maxim Gorky and who died in 1933 from tuberculosis, shortly before the Moscow Trials.