The year is 2032. Its a normal day. Everyone going to work and cops walking the beat in the park. You can hear dogs barking towards the ground. A new breed of tree was growing where they barked. It was genetically engineered to be a perfect tree in every way. able to kill bugs and grow anywhere. 20 years later, After it finally grew it had its seedlings picked and sold. It was like gods tree. No tests could find anything wrong with the tree or seeds it produced. The next summer all the seedlings were grown. Then a better tree was created. The united nations ordered the destruction of the other tree because the new breed wouldn't get along with it. As soon as the loggers started chopping, the trees all sunk into the ground. Then a human like figure rose from that spot. The tree became so powerful it was able to defend itself by turning into the enemy, us. Once the human-tree arose it would bite the logger. The logger would be infected by the sap that was meant to  kill bugs but now turned people into  un-dead ZOMBIES. As more loggers were infected, so were normal people. Everyone was attacked and bitten. And most everyone either died or became un-dead. Some who fought off the zombies managed to live. They found the secret was to destroy the brain. Severed, heads could still bite. But with 3/4 of the world now enslaved, how long could they last.