Robbie Simpson marked his return with a goal as Exeter came from behind to beat Cheltenham 2-1 and boost their hopes of promotion from Sky Bet League Two.Simpson was making his first start since suffering a broken ankle a year ago and he drew Exeter level before Jordan Storey's 81st-minute winner sealed the three points for the Grecians.Jayden Stockley hit the bar for Exeter, but Cheltenham went in front after 37 minutes when captain Carl Winchester picked the ball up some way out.The midfielder advanced forward and unleashed a fine low shot that beat Christy Pym from 20 yards and found the bottom corner.The Grecians were level three minutes before half-time, though, when Simpson volleyed home from Jake Taylor's superb cross.Exeter started the second half purposefully, with Dean Moxey striking the outside of the far post.Jerell Sellars came even closer for Cheltenham when his shot hit the inside of the post before being hacked clear by the Exeter defence.Exeter midfielder Hiram Boateng was next to hit the woodwork as his shot deflected onto the top of the crossbar and behind.However, in the 81st minute, Storey thumped a header home from Lloyd James' corner to seal a massive win for the fourth-placed hosts.