Jason awakens sedated and restrained in a concrete cell at Velocity Labs. Leighton, dressed from a gala, expresses regret yet admits sending an armed man after Jason, tacitly accepting Daniela’s killing as collateral to protect their project. Realizing he’s powerless, Jason pretends amnesia to regain mobility, and Leighton promises diagnostics and therapy while insisting Jason’s brilliance built the lab’s core technology.

Leighton takes Jason to the hangar and reveals a massive, humming metal cube with a vault door—Jason’s project. In mission control, video shows Jason entering the box 14 months earlier and reappearing three days ago, confirming the cube functions somehow beyond known physics. Jason recalls his earlier micro-scale superposition work and deduces the box creates a macro-scale quantum environment, raising questions about overcoming the observer effect.

A staged confrontation follows: Leighton assembles the team and presents a brutalized Ryan Holder, revealing Jason told Ryan and Daniela he’s from another world, with a wife and son. Jason refuses to cooperate, preserving leverage. Drugged, he awakens back in his cell with Ryan, who apologizes for alerting Leighton and confirms he developed a drug targeting prefrontal regions to disable the brain’s observer effect—completing the mechanism that, with the box, allows human superposition and multiverse travel.

Guards remove Ryan; later, Amanda Lucas arrives in the dark cell and reveals Ryan has been killed and that police have been tipped to frame Jason for Daniela’s murder. Rejecting Velocity’s escalating violence, Amanda decides to help Jason escape. They rush toward the hangar, Amanda’s clearance blocked mid-run, and Jason successfully uses his own voice and passcode to open the vault.

Pursued by Leighton’s men, Jason and Amanda reach the cube, slam the door against grasping hands—severing fingers as the bolt locks. In pitch black, Amanda reveals a lantern and a kit containing ampoules of Ryan’s compound. With minutes before the door reopen failsafe expires, they both perform IV injections, the drug hitting Jason instantly. As the countdown nears zero, they commit to the unknown, banking everything on the box.