From the pages of Civil War: Front Line and Thunderbolts! Once he was a hero, now only a shell of Robbie Baldwin remains. As Penance, he begins a slow descent into madness: the most hated man in America, blamed for the disaster at Stamford, tortured by visions of his failure and obsessed with strange, seemingly meaningless numbers. A relentless pursuit begins...

The most hated man in America has now become the most dangerous man in America. After going AWOL from the Thunderbolts, Robbie Baldwin hunts down the one man who can help him get what he needs as the C.S.A. and S.H.I.E.L.D. scramble to figure out exactly what the hero formerly known as Speedball is after.

It's the endgame for Robbie Baldwin as he finds what he has been looking for in Latveria. Can Robbie defeat Nitro, the man who set him on the path to becoming Penance? Or does Penance have something other than just winning a fight in mind?

From the pages of Civil Front Line and Thunderbolts! Once he was a hero, now only a shell of Robbie Baldwin remains. As Penance, he begins a slow descent into the most hated man in America, blamed for the disaster at Stamford, tortured by visions of his failure, and obsessed with strange, seemingly meaningless numbers. A relentless pursuit begins... Collects Relentless #1-5