Argyle debutant Will Atkinson, on loan from Hull, fired Peter Reid’s side ahead after 49 minutes when he cut in from the left wing and let fly with a superb 20-yard effort.
That goal was soon wiped out as Rotherham’s lively winger – and man of the match – Evans finished off an angled run from the right with a thumping angled shot to level the scores after 52 minutes.
Evans then doubled his tally eight minutes later as he benefited from great work by Le Fondre to fire home.
Le Fondre then got off the mark for this term following good work by tireless Danny Schofield in the 82nd minute.
He doubled his tally five minutes later, pouncing on an easy opportunity to score from close range.