Calvin is in a box and tells Hobbes to hop in, they're going to get rich. Hobbes wants no part of it. He doesn't want to be transmogrified, duplicated, or whatever. Calvin reminds him that when the top is open, it's a time machine. Hobbes says that's even worse. Calvin chides him for being such a baby. He says the way Hobbes acts, the dinosaur actually got them last time. He says it wasn't even a carnivore. Hobbes doesn't care. He says Calvin and that box are plain bad news.

Calvin says it's too bad Hobbes isn't going back to the Jurassic period with him. Calvin says they're going on a photo safari. Hobbes says he can drop the "we" stuff. Calvin says he'll have to eat all these great snacks himself. Hobbes asks what kind of snacks and how many.

Hobbes figures if they're good snacks, it's okay to time travel. Calvin sets the dial for 140 million years ago, and off they go. Hobbes asks why they don't get younger as they travel back through time and disappear as they pass the day they're born. Calvin says he'd explain it, but there's a lot of math. Hobbes says he thought Calvin got a "D" in math.

Hobbes asks if it's time for snacks. Calvin explains they're traveling at light speed through an interdimensional continuum lapse. He says to wait until they land. Hobbes offers to inventory the snacks. Calvin says he could help him drive. He's worried that if they miss their exit, they could fly into the big bang. He says there would be no universe, and probably no time. Hobbes thinks they should eat the snacks now.

They see a diplodocus. They're in the Jurassic. Hobbes can't believe Calvin wanted to come back. Calvin said last time, they forgot the camera. He figures they only need a few dinosaur photos, and they'll get rich when they get home. Hobbes thinks if they get in National Geographic, he can meet some of those tigress babes they showed in the April issue. Calvin asks if they were females. He doesn't know how Hobbes can tell the difference.

They have a chance for pictures of stegosaurs. Calvin says these pictures will answer hundreds of questions about dinosaur anatomy and behavior. Paleontologists will pay through the nose for these pictures. Hobbes points behind him to take the picture of the dinosaur that's smiling. It's a allosaurus! Calvin is busy looking the other way for his photo.

Hobbes asks what that ugly brute is called. Calvin is horrified when he sees it's an allosaur. Hobbes tells him he doesn't need to yell. He's standing right there. Calvin tells Hobbes to run. As they run, Calvin tells Hobbes that when they get to the time machine, throw the snacks they packed. It might divert him while they take off. Hobbes says Calvin can throw his snacks, but Hobbes might still want his. Calvin yells that he's going to be a snack himself. He yells to get in.

Calvin tells Hobbes to throw some food. Hobbes doesn't want to throw his sandwich. Hobbes finds a mushy banana that he throws to the dinosaur. Calvin says it was a close call, but it will be worth it when they develop their pictures. Hobbes asks if he can eat Calvin's sandwich, since he rescued it.

Calvin runs up to Mom and asks if she knows where he and Hobbes have been. She says she saw him playing in a cardboard box out back. Calvin says that's what it looked like, but they really time-traveled to the Jurassic period and returned at the split second they left. That's why it didn't look like they left. He says they saw lots of dinosaurs. He asks if Mom will take some film to be developed. He'll pay her back when Time magazine coughs up for his story.

Calvin has the pictures from the Jurassic trip. The pictures came out great. Calvin says they can get their own apartment now. Calvin says he'll also buy a car, but since he can't drive for another decade, he'll get a chauffeur. Hobbes says that if they pay him, he'll have to let them sit up front and beep the horn.

Calvin tells Dad it's too bad he wasn't nicer to him all these years. He explains that he's not inclined to share his future millions with Dad. He shows him the pictures he took. Dad comments that he didn't realize dinosaurs looked so small and plastic. Calvin wants to know what Dad is insinuating.

Calvin tells Hobbes that Dad doesn't believe they went to the Jurassic period and took photographs of real dinosaurs. Calvin continues that Dad thinks they took toy dinosaurs and took pictures of those. Dad told Calvin that if he really wanted to make money, Dad would pay a dollar for Calvin to pull weeds out of the front walk. Calvin told him he didn't want the money that bad.