"Arcee and Jack couldn't have gotten far," Marinette whispered as she and Adrien ran quickly and quietly through the mine. Remaining in the shadows, they stuck close to the wall. Thankfully, Megatron and Starscream veered down a different wider path to inspect some loitering mine drills. The teens were able to once more slip pass them and continued the search for their guardians.

Momentarily, they spotted Arcee's slender figure further down the mine. "Arcee!" they cried at the same time. Arcee turned looked at them. Confusion and fear spread across her faceplate as she wondered why the teens were charging towards her like they saw a ghost. Before either of them could get a word out, Jack yelped in surprise. Arcee redirected her attention towards her other charge and saw what startled him.

Megatron glared at the trespassers from the other side of the cave as a cowering and confused Starscream also looked. Growling in anger, Megatron turned his fusion cannon from Starscream towards Jack and fired. Arcee quickly leaped into action, snatched Jack out of harm's way then anchored down behind a wall. Adrien and Marinette hid behind a wall on the other side of the opening. Megatron continued firing and moved closer to them. Ceasing the opportunity, Starscream fled the scene.

"STARSCREAM! YOU DARE ABANDON ME!" Megatron bellowed then turned his cannon fire towards Starscream. Arcee used this moment to return fire, forcing Megatron's cannon to aim upward. The explosions cracked the ceiling causing the roof to collapse. A huge boulder fell on Megatron, spreading more cracks on the unstable ground. Arcee tried to reach the teenagers but fell into the sinkhole. Jack fell in soon after. Adrien and Marinette looked on in horror as their friends disappeared into the black abyss. Unable to flee in time, Adrien pulled Marinette to himself and held her closely. Marinette wrapped her arm around his shoulders and squeezed tightly as the ground crumpled from beneath them and they freefall.