You're a trainee at a spy academy, learning to hold a cover under pressure. Most missions drop you in as the sole decider: read your cover, then choose the action that fits that identity. Stay in character and the moment passes clean; break character and you give off a tell, and every tell chips away at your nine lives.
Other missions flip the lens: four suspects, one shared profile, but one of them using it as a borrowed cover. Observe them across three scenes. Three align with the profile naturally; identify the imposter whose cover cracks scene after scene. Misread it and the tell lands on you.
Spend all nine lives and you're burnt: your cover's blown, the run's over. Maintain your cover, read the room, watch for tells, and climb from Recruit to Master Spy.