Tim exposits that Wu's men ambushed his team but neither lasted long against the evolved raptors' tactics. He barely escaped and has survived in this makeshift tree-house, studying their patterns for an opening to flee.
Alan watches Tim's footage tracking Wu's movements and what they found at the facility prior to ambush (Tim's phone was smashed) proving InGen's illicit activities. Tim's committed to this proof reaching the outside.
He also shows his laptop (long since out of power) that he used while the battery still lived to back up all his data onto a flash drive. Tim gives the drive to Alan in a sealed bag, insisting that he protect it if anything happens to him.
Upon learning his sister's here, he & Alan slowly sneak around the raptors with T-Rex camouflage (The scent wears off in minutes). Lex reaches the facility's rusted gates only for Spino to break through and kill another mercenary.
The last, youngest mercenary (Let's call him Billy) depletes his ammo to distract Spino until they make it inside where it's too big to reach and eventually gives up for now. They regroup with Alan & Tim for a tearful sibling reunion.
The group explores the labs of horrific illegal experiments genetically splicing dino's into new species (foreshadowing Jurassic World's concepts).
Tim films this evidence and loots papers, storing them in his backpack. Alan finds a possible escape route on a facility map toward a river leading back to the beach with old but usable InGen boats.
This is short-lived when an armed and facially scarred Wu emerges, having survived here on supplies. When the raptors overwhelmed his men, Wu took one of their guns and locked himself inside while they were eaten. He then demands all of Tim's equipment.
When his eyes briefly divert to the camera, Billy attempts to rush him. He's not quick enough though and shot in the leg. Tim surrenders his belongings before Wu pats him down along with everyone else for items.
Much to Alan's frustration, he finds the flash drive Tim gave him and pockets it. Wu notices the remaining T-Rex pee in its labeled flask and compliments Tim's clever resourcefulness.
As Lex struggles to stop Billy's bleeding, Wu is merciful enough to pass her a spare medkit with painkillers & bandaging.
Alan condemns Wu's failure to learn from the dangers of playing God but Wu argues that every major scientific breakthrough throughout human history has been faced with the blanket-statement of "playing God" by someone.
Such sentiment is a recurring expression of fear from the ignorant masses, a primal instinct to reject what they don't understand. But Wu sees genetic engineering's near-infinite possibilities to help mankind progress.
As Wu says this, Alan catches a raptor out of the corner of his eye through a shatter-proof window, indicating that it knows the group is in here and is circling the area. Wu thankfully doesn't notice and keeps monologuing.
He says the potential benefits go far beyond dinosaurs, provided we can study it in order to better control it. When Alan questions how far the risks go and where the line's drawn, Wu replies that Isla Nublar was NOT science's fault.
It was Hammond's childish, short-sighted ambitions, wasting billions on an ill-prepared "prehistoric zoo." He couldn't even protect his property from the late Dennis Nedry, who stole embryos for Biosyn from right under his nose.
Luckily, those were recovered afterward by InGen personnel. Forcing the group to move into a normally locked off compound accessible by raptors, he justifies that even if InGen stopped pursuing this, others still would.
You cannot stop technology or scientific curiosity, nor can the genie be put back in the bottle. This dawn of a new age for civilization is inevitable. Wu asks if Grant would rather have another country get this knowledge first?
As he prepares to re-lock the compound with them inside, he adds that these small sacrifices will not be in vain as InGen will soon be the leading innovators in humanity's future. Lex tries to protest that there's nowhere for Wu to go.
He reveals his own satellite phone however, confident InGen will send another team to pick him up on the beach now that he has Tim's invaluable data. He then smears a layer of T-Rex pee on himself, keeping the gun aimed.
Tim catches a raptor's silhouette from the compound's shadows and quietly pulls a flare (distracts raptors) hidden in his underwear behind the group. The now camouflaged Wu prepares to head for the canal boats to reach shore.
Before he can leave, lamenting that he would give them a quick death but needs the bullets, Tim bravely lights the flare and throws it in Wu's face. He shoots wildly in pain, missing everyone, but the noise draws the raptor!