The episode opens with a flashback of the Harris family eating pancakes. In the present, Izzy is upset, while Gavin tries to remain optimistic that they'll find clues about where Eve was transported.

Lucas won the election and is the Clearing leader. He wants to build fires and line up spikes to keep the dinosaurs away. Judah resents taking orders from a screw-up like Lucas.

Lucas has matured and admits he used to be a screw-up, but he has people counting on him and accidentally announces that he and Veronica are having a baby. Veronica wasn't thrilled he spilled the beans, but everyone was so happy for them.

Scott tells Gavin they might be able to power up the laptop with some wire, copper nails, and potatoes. He tells Gavin that meeting Petra messed him up since he was supposed to meet her mom, Maya Schmidt, the day they fell into the sinkhole.

As they're talking, they hear a noise, and many people run towards them. Scott grabs Petra, and Gavin grabs Veronica, who tells him that dinosaurs invaded the Clearing. The dinosaurs are wreaking havoc on the bus when Gavin arrives and finds Ty and Izzy hiding behind a car.

They debate what to do, but as the dinosaurs fight in front of them, they run in the opposite direction of their destroyed home.

Gavin, Levi, and Sam assess the damage as more dinosaurs attack the clearing. Gavin wants to get the laptop as it's the only link to Eve, but the guys think they need to settle the survivors. Ty offered to let them stay at the Fort.

Sam tries to mediate between Gavin and Levi when tension arises as Levi offers to look for Riley and Josh, but Gavin refuses.

Josh and Riley are flirting while picking berries. They're appreciating the little moments as they kiss. The moment is broken as a dinosaur approaches.

Lucas, Veronica, Sam, Gavin, and Izzy are looking for them when Gavin has another memory of the pancake breakfast, and Levi joins them. In the present, Lucas needs a break, and Sam notices blood on his forehead.

Sam suspects Lucas hit his head during the dinosaur attack, and Lucas doesn't want to worry or burden Veronica. Sam reminds him that a partnership means both must be honest.

The two men hear Josh scream and see him carrying an injured Riley, who was attacked by a Raptor. They rush her to the Fort and suture and bandage her injuries and pray they did it before an infection sets in.

Gavin tries to comfort Josh. Levi arrives with the laptop, hoping it'll give Gavin some answers.

Petra is terrified that turning on the laptop will signal the people who kidnapped her and her mom. Scott assures her no one will find her, and they'll protect her, but they need to help Eve, too.  The potatoes and the wires powered it up.

Someone is talking through the laptop, and once Gavin responds, the voice says they can help find his wife. Ty thinks it's a prank,  but the voice describes Eve perfectly and says he can see her.

Things get complicated because the only clue they are given is the name Sierra before the computer disconnects.

Riley awakens, and Sam looks relieved until she starts thanking him in case anything happens to her.

Ty finds Gavin looking at a rock with Sierra carved into it. He knows the name is connected to the memory he keeps replaying, but he can't crack it. Ty knows he won't like it but thinks he should ask Levi for help since he is in the memory.

Scott interrupts, saying the location transmitter is nearby, and the laptop has a map and a blinking dot.

Lucas collapses while talking to Veronica, so she goes to find Sam.

Scott leads the group, and Ty suggests splitting up. Gavin tells Levi he needs his help and mentions the memory.  After they realize it is Izzy's birthday, Gavin remembers a woman called Sierra, and he tries to leave the program.

He then recalls her name was Maya Schmidt and Levi says that's Petra's mom. As soon as Levi finds Petra,  they are shot with darts and kidnapped.

Scott is horrified when he finds her locket and sees a helicopter flying above. Ty finds a double color Aurora and says it could go two places, one where Eve is.

At the same time, Sam, Josh, and Riley arrive since they want Riley to go through one with medical care. Riley and Josh go through one, and Ty goes through another. He ended up in 2021, only three weeks before the sinkhole happened.