Ridgeway High School is holding a lock-in during which students pull all-nighters and work on finishing projects. At the beginning of the episode the character Brad (previously seen in iHire an Idiot) is hired as an intern for iCarly. He and Freddie team up for their school project, which is a mood reader application for the PearPad called Mood Face. To everyone's surprise, Sam volunteers to work with them on their project, and they accept her help. In the following scene we find out that Sam has uncharacteristically been choosing to hang out with Freddie and Brad often. Spencer agrees to help Carly and Gibby with their project, which includes performing psychological experiments, by being their test subject. At the lock-in, Freddie becomes suspicious of Sam's nice behavior towards him and Brad. When he tests his Mood Face app on Sam, the results say she's in love and Freddie immediately assumes that Brad is the object of Sam's affection. He runs to tell Carly the news, which leads Carly to confront Sam about loving Brad. Sam denies having feelings for Brad, but Carly doesn't believe this to be true. Taking matters into her own hands, Carly decides to set Sam and Brad up (with Freddie's help) by leaving them alone in a classroom. Afterwards, Sam angrily confronts Carly about her matchmaking attempt and insists that she doesn't love Brad. Carly remains unconvinced, mainly because of Sam's recent eagerness to spend time with Freddie and Brad any chance she gets. Sam leaves and goes to sit alone outside the school. Freddie goes out to where she is to talk about what's happened. Sam once again denies being in love with Brad and, frustrated