A Cinderella story: Once upon a song

Seventeen-year-old Katie Gibbs does whatever her stepmother and step siblings bidding with no complaints. Katie sneaks her own-made tape into Guy's briefcase. Guy wants his son, Luke to produce the showcase and start following in his footsteps which Luke doesn't like the idea. Back at home, Bev, Katie's stepsister, starts to practice singing so she can win a recording contract with Guy, but realizing she is terrible. Gail gets a call from Guy and is shocked to hear that he loves Katie's Demo CD. Gail lies and says it was Bev's demo CD and Katie stole it.  Angela tells her to sing it to him at the Bollywood Ball that night and gives Katie a costume to wear. They hear Gail shouting outside and Angela hides just as Gail opens the door. Seeing the costume Katie has, Gail makes her stay home and babysit Victor for the night. After Victor reveals to Katie by hidden camera, that Bev wants Luke and is going to try to win him over at the ball. Ravi reveals he's not actually a guru but a method actor from New Jersey, named Tony, who couldn't refuse Gail's money and is only actually half Indian. At the party, Katie leads Luke outside and sings, which makes Luke fall for her. Meanwhile Angela distracts Gail by challenging her to a dance. After the dance battle, Gail feels sick and leaves. Katie escapes and hurries home, only to find Gail already waiting for her. Gail threatens to expel Angela if Katie does not sing for Bev, Katie agrees to save Angela. Luke tries to find "The Girl with a Beautiful Voice," but instead walks in on Bev lip syncing using Katie's voice in the music room and mistakes her for the girl. Luke falls for Bev and invites her to write a song with him. Her brother gives her and Katie devices that allow Bev to hear Katie, so that she can help her during the date. Katie creates a song and while Luke sings her song to Bev, she falls harder for him. Victor tries to cheer Katie up. Luke believes he is in love with Bev because of her voice and talent for song writing, which actually belong to Katie. At the showcase, Victor sabotages Bev in the middle of the song with Tony's help, much to Katie's shock, forcing Gail to make Katie sing live backstage. Luke sees Katie being dragged by Gail and questions her, eventually realizing it was Katie all along helping Bev write a song with him and on their date. Luke steals the camera and films Katie, having Bev exposed. Gail tries to shut the camera but is stopped by Tony, who shocks her with the cables. Katie finishes her hit song "Bless Myself" and everyone love it. The end.