Iron Heart

Apollo is a skilled undercover agent whose guiding principle has always been choosing to do good. But he also has an unusual gift: extraordinary strength. Because of this, he becomes part of a secret mission meant to bring down a ruthless crime lord named Priam. Eventually, it reaches a point where they each kill someone dear to the other.  

Now, joined by a few allies, Apollo aims to finish the mission. But things change when he learns about a super drug that Priam once commissioned to try and save his first-born son.