What is order IV CPC?

What is order IV CPC? “(1) Every suit shall be instituted by presenting to the Court or such officer as it appoints in this behalf a plaint, together with as many true copies on plain paper of the plaint as there are defendants, for service with the summons upon each defendant, unless the Court, for good cause shown, allows time for filing

“(1) Every suit shall be instituted by presenting to the Court or such officer as it appoints in this behalf a plaint, together with as many true copies on plain paper of the plaint as there are defendants, for service with the summons upon each defendant, unless the Court, for good cause shown, allows time for filing