Worst. Party. Ever.

Mercury Hale's dull day is interrupted by Dominic Zein and the rest of the Procyon heroes — the guys, that is. They take him across the world for a bachelor evening to relax after recent conflicts.

But an enemy reappears in a European nightclub, wielding a powerful weapon thought lost, one that can summon an ancient force capable of bringing the teammates to their knees.

Or turning them against each other.

Mercury must uncover new allies and hunt down his friends, before they grind the resurgent Procyon into the dust, and before the wedding bells chime.