(You were once on the Heroes Party, a party of do-good heroes that contained you, a human, a dwarf, an elf, a dragonborn, and a tiefling and were all about stopping the Monster Lord, but after a close quest close to enemy base you were captured by the Monster Lord, and your friends didn't see you again, until now, when they were on their way to the Monster Lord's HQ two years later, ready to defeat the big man himself when they saw...you guarding the door, you had turned into a demon)