Yet another storyline I've read without realizing it is a continuation. "Batman: Legacy" happens after "Batman: Contagion." The collection begins with Lock-Up imprisoning rogues, such as Two-Face and Killer Moth, in a unknown location. It reminds me of the BTAS episode "Lock-Up". Yeah, the GCPD can arrest Lyle Bolton, but he won't tell where his secret prison is, and without him bringing them food, the criminals will starve to death. Batman, Robin (Tim Drake), and Nightwing work together to find and rescue the rogues, especially when Bolton kidnaps Tim, thinking he's a teen looking to buy drugs.
After that is dealt with, it is discovered that the deadly virus known as The Clench has seemingly returned even worst than before; now people can die within days or hours. Meanwhile, Catwoman is strong-armed by a ninja named Hellhound/Kai to help locate an ancient wheel in the desert of Sudanfor a man named The Collector with another man named Brother Umberto. Umberto has spent 20 years translating the journal of Eritrius, who discovered the wheel centuries ago, and his job is to help Catwoman avoid the traps. Besides The Collector, there are three other interested parties in the wheel: the order of St. Dumas, the Vatican, and "The Immortal."
Back with the Batfamily, Azrael explains that he found the original cure for the Apocalypse Virus in an underground ancient ruin in Sudan. Batman, Nightwing, and Robin decide to travel there in search of another cure, leaving Huntress in charge while they are gone. The three find the dig site, as well as the immortal Ra's Al Ghul and his entourage. They fight, almost drown or die by sword, and unfortunately, Ra's Al Ghul and his daughter Talia get away, but there is also another familiar face: Bane.