"A helicopter chase over the Atlantic. A castle full of deadly secrets. A mission that should have been simple reconnaissance. And none of it goes according to plan. When Onyx Sector agents arrive in Dublin for what seems like a routine training mission, they quickly discover they've walked into Zmaj's web. The notorious villain has gathered an army of former IRA operatives and set a trap that will test every skill the team has learned. From Dublin's ancient pubs to a fortified castle, Charlie Perkins must prove herself as the newest recruit while seasoned agents Burke, Hall, and Archer fight for their lives across land and sea."