Things take a dark turn on this episode of 'Glee,' both literally and figuratively. The school is cast into darkness when the power goes out and the kids go unplugged for their glee club assignments. They also unplug their feelings and admit some secrets they've been keeping hidden away in the dark.

Ryder (Blake Jenner) is busy sending messages to the person who is cat-fishing him, Katie, asking her why she has stood him up twice. While he's spying on people in the room to see who is texting him, Mr. Schuester (Matthew Morrison) says he's been spying on the competition. Much to his dismay, they have a new sophomore with a big voice. As he announces the theme of the week, the lights go out and he quickly changes the lesson to being unplugged.

The students are forced to go to class while carrying flashlights and Ryder talks to Jake (Jacob Artist) about Katie and how she knows his biggest secrets. Jake suggests Ryder share his problems with people who actually know him.

In New York City, Santana (Naya Rivera) walks in on a mini-intervention that Kurt (Chris Colfer) and Rachel (Lea Michele) are holding for her, concerned that she is wasting her life. Santana sees nothing wrong with being a cage dancer and tells her friends she has no interest to focus on her talent and waste her time singing like the rest of them and walks out.

Sam (Chord Overstreet) plays 'You've Lost That Lovin' Feelin' by the Righteous Brothers on acoustic guitar. Artie (Kevin McHale) goes next but says he can't play his song without his synth which requires electricity. Sam freaks out, saying that when he was poor they couldn't afford power and that everyone should take the day to unplug for real.

Kurt is back at his internship with Vogue and his boss Isabella (Sarah Jessica Parker) doesn't seem to care that he's been spending so much time at NYADA since he's so good at his job. Kurt's dad is mentioned and we learn his cancer treatments went well. Isabelle then asks Kurt to help plan the New York City Ballet Gala and says he can get friends to help him out.

Sue (Jane Lynch) is writing in her journal about her new job as a personal trainer. Blaine (Darren Criss) is in her class, Sue90X, and says she needs to come back and save the Cheerios. He also wants her to return to set the record straight for all the scared kids at the school.

Artie approaches Sam in the hallway saying he was inspired to make a song with no instruments at all.

Kurt invites the girls to go to the Ballet Gala with him. Rachel is excited as she and Kurt reminisce about their own ballet classes, but Santana says she doesn't want to go. When he says she'll get to wear and keep a designer dress she changes her mind.

Ryder decides to "unplug" his feelings by singing REM's 'Everybody Hurts' and while he sings everyone has flashbacks to moments when they were slushied in the face.

After the song is over, Ryder admits his secret: he was molested by his babysitter. When he reveals she was a teenage girl, the boys in the room get excited and say it's like something out of an 80s movie. Will tries to explain why this is wrong, but before he can explain why, Ryder pretends it's okay and the guys were right, he was lucky to get touched by his babysitter. A visibly upset Kitty (Becca Tobin) watches him.

That night, Kitty takes Ryder out to dinner to talk to him. After saying that she and Puck (Mark Salling) broke up, she tells him that she understands how he felt and says she was molested in sixth grade by her friend's older brother. She was so upset her parents would be disappointed in her that she didn't tell them right away. When they finally find out her friend told everyone in school that Kitty was spreading lies and she lost all her friends. In response, she switched schools.

In the auditorium, the kids perform a  'Stomp' style performance of Queen's 'We Will Rock You.'

Sue goes to watch the Cheerios incognito when Becky (Lauren Potter) approaches her and asks her to come back. She tells Becky that getting fired was the best thing that ever happened to her and she can't ever go back to babysitting brats. She sings 'Little Girls' from the musical 'Annie' while knocking over Cheerios. Back in the real world, she tells Becky she doesn't miss it at all.

At the gala, Isabella invites the kids to watch the ballet with her. Kurt says Santana doesn't like the ballet, but when Isabella says all girls want to grow up to be ballerinas, Santana admits that she took a few lessons. It was the first time she ever danced and she loved it.

They all sing 'At the Ballet' from 'A Chorus Line' and when it's over Santana admits that she loves dancing. Isabella tells her it doesn't matter how long it takes someone to get somewhere, just as long as they end up doing what they love in the end.

Coach Roz (NeNe Leakes) brings Becky to the Principal's officer for her insulting her. When Roz leaves, he reprimands Becky. Becky tells Principal Figgins (Iqbal Theba) that she got herself sent to his office on purpose, so she could talk to him.

The power turns back on and the kids celebrate. The glee club kids are all ready to unplug but Will thinks they still need to enjoy their most powerful instruments: their voices.

Ryder tells Katie (online, obviously) about his plan to suss her out when he revealed his secret. She hints that the phone that rang in the glee room when he tried to call her may have been a coincidence. When she asks Ryder why he's still talking to her, he says she's brought something special out of him. Kitty asks Ryder out for lunch, but he blows her off for Katie. Kitty reminds him that Katie's just a projection of what he wants her to be. He suggests they go out once he's figured out the "Katie thing" but she turns him down.

At NYADA, Santana arrives late for a dance class. When the teacher asks why she's there, Santana says it's because she loves to dance and wanted to be reintroduced to her first love. Inside the studio, the lights dim and young Santana clad in a ballet outfit asks her older self not to forget her again. She promises she won't.

Back in the auditorium, the kids perform an a capella version of Billy Joel's 'Longest Time.'