Valentine's Day is coming up and love is in the air between Beth Malloy and Josh Hatford. When they are spotted holding hands, Josh tells his teasing brothers that he's simply spying on the girls to see what they're plotting next. Meanwhile, big sister Eddie couldn't care less about that mushy stuff. All she cares about is her sixth-grade science fair project. But when she comes up with a great plan, Josh and Jake Hatford horn in on her project. Little do the boys know that Eddie has a trick of her own up her sleeve. Get ready, the Malloys and Hatfords are at it again!