Who are you?
Suzanne Velarde and Kara Velarde are identical twins, separated after one is adopted at the age of 5. Kara lives at the Love House, an orphanage in San Sebastian Province where the younger residents look up to her as a mother figure. However, she hides the fact that she is bullied at school by a gang of mean girls led by Audrey while teachers turn a blind eye.
On the other hand, Suzanne is studying at Queen Emerald High School the most prestigious private high school in Arcadia City. Suzanne best friends are Darlene and Ellie and she shares a mutual attraction with Marcus the school's star swimmer. They have been friends since they were 8 years old.
Suzanne and Kara look exactly alike, but only Suzanne is aware of the other's existence. Unlike the cheerful Kara, Kara is prickly and secretive.
One day, on a school field trip, Suzanne mysteriously disappears. At the same time, Kara is unjustly expelled from her school and jumps off a bridge in a suicide attempt. Ten days later, the injured and amnesiac Kara is mistaken for her twin Suzanne, and her adoptive mother takes her home to where she starts living as Suzanne. But soon her memory returns. Kara faces many challenges as Audrey transfers to Queen Emerald High School and tries to reveal her real identity, as well as use her dad's help to make Kara transfer. Luckily, Tristan Kara's classmate and the school troublemaker, protects her whenever Audrey tries to bully her. Soon, Kara tells Tristan her real identity, and Tristan becomes the only person Kara can trust. He eventually begins to develop feelings for her.