She is at it again, delineating on the silver screen the relationship between a school teacher in the heart of the Sundarbans and a coy girl in Japan -- a bond established and nurtured through exchange of letters.

After the wide critical acclaim of her previous movie 15 Park Avenue, Sen is shooting her next film in the Sundarbans. The film is based on The Japanese Wife, a book by London-based author Kunal Basu, a teacher in marketing at the Said Business School and Templeton College, Oxford University.

According to Basu, Sen liked the story when he narrated it to her during a visit to Kolkata last year.

The Japanese Wife oscillates between India and Japan and the turning point comes when a young widow Sandhya enters the school teacher Snehamoy's house with her son.

Snehamoy is confronted with a complex situation: He shares domesticity with a woman he is not married to but is married to someone with whom he has experienced no domesticity.

Rahul Bose, who featured in Sen's award-winning film Mr and Mrs Iyer and 15 Park Avenue, plays the role of Snehamoy and Raima Sen plays Sandhya. Japanese actress Chigusa Takaku and veteran actress Moshumi Chatterjee play other central roles.

Kunal Basu, who had appeared in Mrinal Sen's Punascha and Abasheshey, too has a cameo in Sen's film.

The Japanese Wife, the book, is expected to be released in January next year and Basu says his next work too will feature contemporary India.

This is the first book by Basu, who has earlier works include The Opium Clerk and Racists, will be reproduced on celluloid.