Hi, I'm Dj and I can give you limited help on this.
First off, take that circuit breaker out before you burn the car to the ground. That circuit was designed for a 10 amp fuse, which means the circuit should only be drawing about 5 amps. You have a hard short to ground and the only result with that circuit breaker is more damage.
Do you have a list of the items that are on the circuit?
What is the name on the fuse that is blowing?
Are there any accessories added to the car, radio, lights, radar, anything like that?
Has the vehicle been in an accident in the past couple of years?
Let me know and we'll go from there.