What's 'The Secret' to Heatbeat's success? Could there be a magic formula that has brought them to the top of their game? Sadly, the answer seems to be an unequivocal "no". Heatbeat have earned everything they have through a non-stop barrage of quality productions, including their latest vocal tune featuring Quilla on vocals. Like a fallen angel, this tune is bittersweet, pure, and enchanting.