Yei!— Is what Gina says in positive situations or simply whenever she is happy. She has won a scholarship to the prestigious Caribbean Music Institute (CMI) on the island of Puerto Rico, the best place in the world to study Latin music and the birthplace of the successful reggaeton thanks to her lyric-writing abilities. Gina is a cheerful, energetic, and creative girl who loves writing. Her ultimate dream is to write songs.
One of the most prestigious psychiatrists in Mexico decides to put her three children to the test to determine how to divide their inheritance. Everything gets complicated when one of her patients decides not to collaborate with them.