Patrick finds himself on trial for betraying the kingdom, and only avoids punishment with a Hail Mary promise to the king: that he will find the legendary leprechaun gold.

The wedding of the year brings Merriman a chance to mend fences with King Rami IV, whose son is arranged to marry Holden the squire. But when Ruben crashes the wedding to win Holden back, Patrick uncovers a malevolent undercurrent to the nuptials.