Kalakal is a story about the disturbing truth on living in a poor neighborhood and the extremities that people can do to make ends meet.
This unvaryingly demonstrates how people will trade their dignity and principles in exchange of nurturing life's vanities whether it would be satisfying physical needs leading to human trafficking and violence, or just plainly get a hold of someone's decision on money by using seduction.
Thus, we're taught that we reap whatever it is that we invest in life.