Mason Kane is Citadel’s top Tier-One agent. While his relentless bravado might be off-putting to some, he’s Citadel’s go-to guy to see the most impossible missions through. No location is too impenetrable or villain too insurmountable for the one-and-only Mason Kane. Not one for small talk, Mason tends to lead with ego, sarcasm, and biting wit. His tough, inscrutable exterior is very much by design. The fewer people he allows in, the less likely he is to ever get hurt. However, his macho, emotionally aloof disposition is no match for the swell of feelings he has the first time he lays eyes on fellow Tier-One agent Nadia Sinh. From their meet-cute on mission in the Alborz Mountains to their final moments before the Fall of Citadel, it’s clear that these two are cut from the same high-octane cloth. They live and breathe the same cryptic spy language and edge-of-your-seat lifestyle, which forms the foundation of their romantic relationship with one another. But their love can only take their relationship so far. When their secrets start to surface and their true motivations take shape, Mason and Nadia are forced to confront the fraught entanglement of their multiple realities. But before they can work through their relationship drama, the unthinkable occurs. Citadel is compromised by a mole and the entire organization is brought to its knees by the sinister organization known as Manticore.