Alvin was always the one noticed. He stood out in the crowd. You could say he was always visible. Simon was always in the shadows. You could say he was invisible to everyone. While working on his science project one night, he accidentally makes a moth invisible. He tries to catch it, but it gets away. Later that night, Alvin takes a drink of water, not knowing he was also drinking the moth that fell into his cup. The next day, he turns invisible. Now with a bigger problem than his science project being due on Monday, Simon must figure out how to reverse everything and save his brother from becoming invisible forever.