Valentine's Day is just around the corner, and something very strange is happening in the neighborhood: love is actually in the air! When Beth Malloy and Josh Hatford are spotted holding hands, Josh desperately tries to save face. He tells his teasing brothers that he hasn't gone soft he is simply acting as a spy to figure out what the sneaky Malloy girls are plotting next. But the romance doesn't stop there. Daredevil Caroline Malloy decides that she needs to know exactly what it feels like to fall in love, and she sets her sights on poor, unsuspecting Wally Hatford. Meanwhile, older sister Eddie wants absolutely nothing to do with all this mushy stuff. Her only focus is winning the sixth-grade science fair. When Josh and Jake Hatford decide to crash Eddie's science project, they have no idea what they are walking into. Eddie has a brilliant trick up her sleeve, and with Caroline planning an amazing, attention-grabbing stunt, total chaos is guaranteed. Get ready to laugh out loud as the legendary rivalry between the Hatfords and the Malloys takes a hilarious, heart-shaped twist in this unforgettable battle of wits and crushes.