Gravitas

The world's greatest villain has unretired for one last mission. Saving the world. After a serious injury, Christoph "Gravitas" Holtz has retired from supervillainy. Heading into his silver years all he wants is to reminisce, garden, and teach his next-door neighbor's daughter the finer points of proper villainy. But when a classless young supervillain threatens Holtz and those he cares about, he turns to an old ally for help with one final mission.
When the mission goes wrong, Christoph will have to struggle against a dangerous enemy he helped unleash, his feelings for his superhero ex, and his own sense of what it means to be a hero or villain.