The Indian Law is not a single Book which contains all the laws. There are different laws and each law contains various Sections.
Some of the important Indian Laws are :-
1. The Indian Penal Code-deals with crime and punishment.
2. Indian Comapny's Act-deals with formation and other issues of companies.
3. Indian Succession Law.
4. Indian Contracts Act.
5. Indian Income-tax Act. etc etc.
The section 304 you have referred belongs to Indian Penal Code. The current IPC has about 500 Sections. Some of the important sections are Section-302 for Murder, Section-420 for Cheating, Section-498A for cruelity against women etc.
Disclaimer :- Because of the limited facts given by you, the reply post can only be taken as a guidance and not a sound legal advice. Please give full details of your case for an expert legal opinion.