When the war with the Plants and Zombies fighting each other, things doesn't feel right. There was no peace, no friendship, no nothing. The Smash feel like something was wrong. He felt bad about smashing the plants, even when his wrestling moves are too real. After he got defeated by the Plant Heroes in a wrestling match, he begins to think of something to help return it back to normal. He made a wish. A wish about making the world a better place. A new threat is approaching. The Darkness has risen from somewhere that nobody has ever seen before. It's spreading and causing it to turn the Plant Heroes and Zombie Heroes into possessed evil (edgy) version of themselves. The Gnome King, King Gnomus has has been captured by a zombie who wanted revenge. It was... Trickster. A tricky zombie who gets his revenge on Dr. Zomboss. Now he's turning every plant and zombie into possessed creatures. Will they save the day or will they fall into the darkness and become the Darkness army?