Identical twins Jessica and Elizabeth Wakefield can't believe their eyes. While on a family vacation at the Triple Z Ranch, they meet two perfect guys - who happen to be thirteen-year-old twins! Elizabeth hits it off immediately with Nick Handel, and his brother, Chris, is the boy of Jessica's dreams. At first.
After one double date, the girls think that maybe they each picked the wrong twin. They don't want to hurt the boys' feelings, so they pull a secret twin switch. Jessica pretends to be Elizabeth . . . and Elizabeth pretends to be Jessica. But on their second double date, the Wakefield twins begin to wonder . . . they are each with the right boy now, aren't they?
One thing is certain: A twin should know better than to trust a twin.

"Jessica," Elizabeth said between giggles, "let me get this straight. We were each pretending to be each other-"
"-just so we could be with the guy we reallt liked!" Jessica finished the sentance, and they both collapsed with laughter.
Elizabeth's forehead wrinkled with concern. :How do we tell them without hurting their feelings?"
"Good point," Jessica said, sighing heavily. "I can't just tell Chris I'd rather be with Nick and you can't just tell Nick that you'd rather be with Chris."
"What are we going to do?" Elizabeth moaned as she flopped down next to Jessica.
Jessica thought about it for a few minutes. Then she bolted up. "I've got it!" she exclaimed.
"What?" Elizabeth asked, raising herseld up onto her elbows.
"I don't know about you, but I had Nick totally convinced I was you," Jessica informed her sister.
A slow smile spread across Elizabeth's face. "And I had Chris totally convinced that I was you!" she added, sitting all the way up.
"Are you thinking what I'm thinking?" Jessica asked, her eyes twinkling with excitement.
Elizabeth nodded. "Let's switch places for the rest of the trip."

What will hapen when Dr. Q comes to Sweet Valley? The Mysterious Dr. Q