Simon Reeve continues his epic journey around the world following the Tropic of Cancer, the northern border of the tropics region.

In India, Simon's journey takes him from the coast of Gujarat in the west to Kolkata in the east. Along the way he spots the shy and beautiful Indian wild ass, learns of the violence between Hindus and Muslims in Gandhi's home city of Ahmedebad and visits the site of one of the world's worst industrial accidents in Bhopal, where people still claim to be suffering from chemical spills.

In the setting for Kipling's Jungle Book, Simon bathes an elephant and in Kolkata he ponders a new car that is so affordable that it could add to the city's already unbelievable congestion.