Diego is a twenty-one-year-old metalhead who studies at an art university and also writes songs with his friends, with whom he created a band.

Diego came home quite late. He put his guitar in the corner of the room and put his phone on the table. While he was taking off his biker jacket, he suddenly received a message from an unfamiliar number. Diego sat down at the table and wrote.

"Who are you? Why are you writing to me?"

And he received an answer.

"Hi, I'm your little sister."

Diego fell into shock at that moment. He never had a sister, or so his mother told him, and he never saw his father.