The room buzzed with tension as the time travel engineers huddled around a large metallic door. They were waiting for the first sets of time travelers to come through.

Suddenly, the door shuddered and out stepped a group of individuals. They were garbed in extravagant clothing and adorned with gold. These were the Time Criminals.

The engineers listened in disbelief as the Time Criminals narrated their tales of plundering precious metals from past civilizations - the Chinese, Egyptian, and the Incas.

They had used the time travel technology to steal big, exploiting the past for their own gain. The engineers were aghast at the audacity of these criminals.

The engineers, outraged by the Time Criminals' actions, vowed to stop them. They decided to use their knowledge of the technology to prevent further exploitation of the past.

Working tirelessly, they developed a plan to intercept the Time Criminals during their next time heist. The race against the clock had begun.

The engineers travelled through time, hot on the trail of the Time Criminals. The chase was frantic, crossing eras and continents, but they were always one step behind.

Despite the setbacks, the engineers refused to give up. They knew the stakes were high - if they failed, history would be forever altered.

Finally, they confronted the Time Criminals in an ancient Egyptian city. The showdown was intense, a battle of wits between the engineers and the criminals.

The engineers, using their superior understanding of the technology, managed to outsmart the Time Criminals. They retrieved the stolen gold and returned it to its rightful place in history.

Returning to their own time, the engineers felt a sense of relief and triumph. They had saved history from the clutches of the Time Criminals.

They vowed to safeguard the time travel technology, ensuring it would never fall into the wrong hands again. The adventure had taught them the importance of their role as guardians of time.