the same time. >> that's him right there. >> so how are you? >> while 26-year-old, a software engineer is in the backyard, another man is heading towards our house. i'll have to time my interview with him just right so the men won't run into each other. >> hey! i made some frozen lemonade. sit down. i'm going to go get in my swim suit. is that okay? >> sure. >> okay. pour me a drink. >> he calls himself mannbay2004. he makes a date for sex with a girl he believes to be 13. he says i will go till you tell me to stop. the decoy sas i, if i do not stop, how far would you do? he says, all the way. remember, this man has no idea he's being recorded by hidden cameras. >> what do you want to do? >> let's see how it goes. yeah? >> okay. so you're playing hard to get, huh? >> uh-huh.