there is no power

my car is just dead there is no power to anything , just out of the blue. i went to the gas station came back to my car unlocked it everything was on then right as i turned the key everyting went dead then half way through a smoke the lits and everything came back on then two seconds later it turned right off again the battery is fine the cables on the battery are fine , help?

What year, model and engine do you have?

Is the SECURITY light on? Any other indications. Any clicking noises from the starter. Are the dash lights on when you take key to run or start?