S01E03 - First Defeat

For weeks archeological teams have been exploring the sands on Lyshan Colony to discover it's history. But until now it revealed nothing. Then the team comes across an ancient weapon from a time long gone. As they are trying to unravel it's mysteries a countdown is initiated, planning to annihilate Langley Station in twenty hours time.
But is the weapon as ancient as it appears? And how does a weapon that's been dormant for so long suddenly activate? Is foul play at hand?