Ami Subhash Bolchi is a Bengali socio-political drama film directed by Mahesh Manjrekar. The film stars Mithun Chakraborty, Saheb Bhattacharya, and others. Ami Subhash Bolchi is a thoughtfully crafted cinematic gem that blends contemporary issues with a profound nostalgic feel of the past. Stirring, compelling, and wholeheartedly entertaining, it is a balancing act between the past and the present-day realities that epitomizes the strength and spirit that shaped the City of Joy - Kolkata.

The central character of the film is Debabrata Bose, a role beautifully portrayed by Mithun Chakraborty. Debabrata is a middle-aged man, an ordinary citizen of Kolkata whose life is filled with issues that most people in India face today – the suffocating presence of bureaucracy and corruption, the lack of ideals and values, and the weakening of Bengali culture. He is deeply disturbed by the erosion of Bengali values and culture, the lack of passion and the the spirit that the young generation either totally lacks or misdirects entirely.

Mithun, with his charismatic screen presence, offers an astonishingly resonant portrayal of Debabrata. He embodies the pain, passion, frustration, and hope of a common man who is in love with his city, heritage and culture. The way Chakraborty's character oscillates between two different lives and times forms the crux of this powerfully engaging narrative.

In his trials and tribulations, Debabrata draws inspiration from the iconic national heroes - Netaji Subhas Chandra Bose, Bhagat Singh, and Swami Vivekananda, who form a major secondary theme in the film. Saheb Bhattacharya plays the character of Animesh, Debabrata's son. Debabrata's qualms and complaints with the present generation are articulated through the character of Animesh, his son in the film. Animesh represents the young generation, the need for change, and the hope of a better future.

Ami Subhash Bolchi is the voice of a common man and his quest to restore the glory of his beloved city and its culture. It's a cinematic outcry against the decaying societal values, the inefficiency of systems, and the new generation's detachment from their roots and heritage. The film tells a somewhat different kind of nationalistic story - a significant departure from the norm, but it hits all the right emotional chords.

Notably, the director uses the City of Joy as a backdrop to tell not just one man’s struggle, but subtly unravels the rich tapestry of the city, its heritage, language, culture, and unique spirit. Yet, the city's vibrance and vivacity come alive in rich shots, creating a character on its own.

Essentially, the film is a poignant commentary on our current times, cleverly critiquing our fast-changing social fabric while equally celebrating the glories of the past. Despite these thought-provoking layers, at its heart, Ami Subhash Bolchi is a very personal journey of Debabrata, who stands as a representative for many who are enduring the same struggles and situations.

In conclusion, Ami Subhash Bolchi is a significant work of Bengali cinema; a film that truly represents the despair and dreams of the common man. It is not just an engaging story about one man’s struggle and his love for his culture and heritage; but it is also a critical call for introspection about our society and its rapidly transforming values. The movie rides high on its powerful screenplay, tight editing, and narrative pace that keeps you engaged till the end. However, the lifeline of the film remains Mithun Chakraborty’s impeccable performance and the credible supporting cast - together they make it a film experience worth watching.