There is a kingdom and in the kingdom when you drink a poison the only way to cure yourself is to drink a stronger poison to neutralize it. The King wants to make the strongest poison possible in order to make sure he can neutralize any other poison he may be given. To do this he enlists the two best chemists of the land: Tushar and Boman.
The king is going to have them both create a poison as strong as they can then have them drink the other person's poison then their own. Whoever dies created the weaker poison. Tushar knows that Boman is much better at making poisons and he is sure to make a stronger poison. Knowing this, Tushar makes a plan that ensures he lives and Boman dies.
The day of the contest arrives and Boman realizes that Tushar must have known he had no chance against his prowess as a poison maker. So Boman thinks quickly and creates a new plan that ensures that once again he will live and Tushar will die.
In the end Boman lives, Tushar dies, and the King doesn't get what he wants.