The team had been sent a timer, set for exactly the amount of time you had left.

you'd been missing for nearly a day, the unsub capturing you in broad daylight. They'd been taunted with your death, the only instructions they'd been given were a riddle and a graveyard.

Garcia had managed to decode the riddle, leading the team to the knowledge that you'd been buried alive in a sealed coffin.

And that your time was running out.