Two Days Later. Justin woke up to find a monstrous sight awaiting him. Justin's Left hand was sky black. He reached to grab his coat, but it decayed.
He didn't know what was going on. It petrified him. The major problem was not the hand. It was what the hand did! Anything he touched would decay within a second. And it was tough for him to not keep touching things as he was a left-hander. He went to his dad, seeking help. John, surprisingly, had a cure for this. He briefed that during a test run, this "d-cay virus" had already created a scene. But the thing he couldn't understand was how it had managed to re-animate itself. John made sure that he had obliterated its entire existence and the chance of it revitalizing itself was near impossible. This is where Justin filled in the gap. When he revealed what had happened and who he was covert, it infuriated John. He understood why Megan had suggested that he take a break for a few days. John, putting his anger aside, injected a serum which he termed as the "d-cay shot". There was only a handful. Justin's hand was still a blight, but the decaying stopped. As they got out, a bewildering sight caught their attention. The entire city was decaying. and the virus spread from object to object. The last thing Justin touched was his garden hose, on which he had tripped while going to his father's lab. John was so irked by now but had kept it inside. He went back into his lab and took an atomizer (a device used to disintegrate). He reverse-programmed it, infused it with the remaining batch of the d-cay serum. Megan came running. Her face showed the purest form of fear. Her jacket decayed. The decay spread down to her body. John, without thinking further, shot Megan with his atomizer. The results were amazing. The Serum worked, and the decaying stopped and Megan's body reimposed. So terrified was she that she had fainted. Justin grabbed her and placed her on his bed. John and Justin then entered the city and fought the virus. But to their avail, the serum wasn't strong enough to eradicate the enormous swarm. It showed the traits of a parasite.
They were growing stronger by the minute while Justin weakened. John got a precise idea of what's going on. The virus seized Justin's Left Hand, making him their host. When John destroyed the fragments of the virus in Justin's Hand, The virus had already weakened. But by then, it was too late as it spread to the city, thus increasing its proportions while still maintaining contact with Justin. So summing it all up, the only way to get rid of the virus was by cutting off Justin's Left Hand. At first, Justin showed resistance but he agreed as he knew this entire mess was his fault. And so, John cut off his own son's hand, thus stopping the virus. Soon enough, constructions began. The citizens considered John and Justin as heroes. Justin got a new bionic hand. Everyone was safe.