The war for warp-cursed Croatoas rages on.  Hailed as "Giant-killers" for their heroics during Operation Jotunn, Lieutenant Commander Hadeya Etsul and the crew of the Leman Russ Demolisher Steel Tread are hurled right back into battle.

Assigned command of a convoy of armour and infantry, Etsul is tasked with escorting a legendary lord commissar through contested territory to stabilise the wavering Ruega Front.  But with a new crew member disturbing the delicate harmony of her tank and a malevolent nemesis lurking unseen in the high passes ahead, the mission proves even more dangerous than first thought.

As Etsul's troubles multiply she is forced to risk everything - even the hard-won trust of her crew - in the name of duty.