Deepika Padukone, who'll be seen portraying acid attack victim Laxmi in 'Chhapaak', has said the upcoming film is about the "human spirit". "It's an important story to be told. Period...It's about bravery and triumph. Hopefully, we'll be able to bring about a social change," she added. Deepika further said there is a lot to learn from Laxmi's journey.