Vanessa, a prostitute from New York City, traveled thousands of miles to undergo surgery that would change her life forever -- transforming her body, outwardly, from male to female.
"I've been transitioning since I was sixteen," she told "Nightline" anchor Cynthia McFadden. "I don't want to go back to that awkward little boy that was shy, and hid away from everybody."
With surgery brings the promise of metamorphosis; the 19-year-old is getting a new nose, new jaw line and breast implants.
"The surgery is going to make me, I feel, blossom from a caterpillar to a butterfly," she said.
In the United States Vanessa's surgery would cost upwards of $30,000, but in Mexico, Vanessa said, the surgery would cost $6,500.
Like most transgender children, Vanessa said she has always felt very much alone. Parents who accept and support their transgender kids seem to be an exception to the rule.
"I've always been against gay people. Honestly," said Vanessa's father, Carlos. "Not for anything, it's just I didn't understand. I was born a man so I don't understand how the other sexual behave. For me, man is a man, woman is a woman, and gay is gay. For me, it wasn't acceptable."
Both of her parents said they were upset when their son told them he wanted to become their daughter.
"I was praying every day, 'God please, open her eyes, open her mind, please," Carlos said. "That's what I was asking God: Why my son? Why this has to happen?"
"I feel that I lose my son," said Vanessa's mother, Anna Maria. "I miss my son. I don't know where he is."
But it's not just the eyeliner and the hair highlights. Vanessa, who charges $200 an hour for sex, saved up for her surgery, one client at a time, from working in cheap hotels on the outskirts of New York City.
"After a while, I just learned to suck it up, and just disconnect from it completely, and say, OK it's just work," she said. "I see it as a big sacrifice I have to make, but it's worth it now."
Vanessa uses her current body to finance her new one.
"I've actually tried to look for jobs before but no one hired me," she said.
Vanessa's sister Annie said she was heart-broken when she found out her sister was prostituting.
"I remember telling her like, 'There's other ways,'" Annie said. "She would ask me, 'What way? You tell me and I will do it.' And I had no answer for her."
"I feel like there is other ways to make your living in a different way," Carlos said. "I talked to her about it. The only thing that she told me was, 'Dad, I got to do what I got to do.'"
Her father is the one who drove her to the airport when the day came for Vanessa to fly to Mexico for her surgery. It has taken a long time to come around to the idea of his son becoming a daughter, but he's doing his best.
"I got to support her all the way to the end," Carlos said. "Whatever makes her happy, it makes us happy too."
After a 14-hour plane ride, Vanessa landed in Guadalajara, Mexico's second largest city and a rising hotspot for medical tourists from around the world.
When Vanessa checked in to Hospital San Pio, a modest two story building next to a gas station, her doctor appeared to be in a hurry. The consultation was no more than 10 minutes.
"You pay me now please? $6,500?" Dr. Sonny said, which Vanessa handed over in cash.