The story of the movie starts with a foreboding sound that awakens the citizens of the city of Pataliputra. The King of Pataliputra orders his soldiers to investigate the strange noise but they don't return. Chhota Bheem and his friends Raju, Chutki, Jaggu, and Kalia are in the city when they become aware of the situation. They decide to help the King and his army and set off on a mission to investigate.

As they enter the city, they come across Yama, the god of death, who informs them that a demon named Kaalasura has taken over the city of Pataliputra. Kaalasura is a powerful demon who has the ability to turn all living beings into his slaves. Yama further tells them that in order to defeat Kaalasura, they must find three magical gems that his minions have stolen.

Chhota Bheem and his friends start their quest to find the three magical gems. On the way, they encounter a talking parrot who agrees to help them find the gems in exchange for his freedom. They also come across a group of monkeys who have been enslaved by Kaalasura. Chhota Bheem and his friends rescue them and they too in the quest to find the gems.

As they move deeper into the city, they encounter various obstacles and enemies. In order to overcome them, Chhota Bheem and his friends use their intelligence, bravery, and special abilities. They also receive help from Lord Krishna, who comes to their aid whenever they are in trouble.

The movie features some breathtaking action scenes, especially the fight between Chhota Bheem, and Kaalasura. The animation quality is superb, and the voice acting is excellent. The movie also has some catchy songs that add to the overall entertainment value.

Overall, Chhota Bheem & Krishna: Pataliputra- City of the Dead is a highly entertaining animated movie that can be enjoyed by both kids and adults. The storyline is engaging, the characters are lovable, and the animation is top-notch. It is a great addition to the Chhota Bheem franchise and is definitely worth a watch.