Odyssey RPG

Ok, basically, I have no idea what to do for the plot! All I have is the intro. Any ideas?

Intro:It's very hot summer day in Odyssey, and everyone is doing what they normally do in Odyssey; Mr Whitaker is serving ice cream, Connie is- well- being Connie, Marvin and Trent are playing some 'music' in their band, Nelson is doing a science experiment, Wooton is 'delivering mail'-or whatever he does, Jack Allen is working in his antique shop, and Lawrence is getting into some kind of trouble.

Nelson was working in his back yard, trying to mix some chemicals. He dropped a drop of another acid and, "Whammo!" there was a huge explosion.
--30 minutes later, and a lot of work later--
"Nelson Swanson! What have I told you about trying to mix those chemicals in my backyard?! Stop it! And you're grounded for one week." his Father said. Nelson groaned and said, "Yes, Dad." He walked up to his room.

Lawrence was walking to Whit's End, battling the destructoids along the way, when suddenly, he heard a huge explosion. "Ahhhhhhh!" Lawrence shouted. He started running to Whit's End.

Harlow was in Whit's End drinking a nice cold lemonade. "Jumpin' Jamaican Gymnasts, Whit!" he cried, "there's nothing like a cold lemonade for a tough case!" "Well, I'm glad you like it, Harlow," Whit said with a grin. "Mr. Whittaker! Mr. Whittaker!" Lawrence yelled as he swung open the doors to Whit's End. "We're under attack!"