PJ met a girl Emma at the park. By accident, PJ brought home the baby who had been with Emma, and Emma took back to her home the baby who had been with PJ. PJ tried to call Emma, but found Emma gave him a fake number.
The sister Teddy said, "Come on, let's go to the park."
The younger brother Gabe said,
to meet the girl who blew off PJ. I'm there.
What does "I'm there" mean?