Leo Graf is an effective engineer. Safety Regs aren't just the rule books he swears by, he'd helped write them. All that changes on his assignment to the Cay Habitat. Leo is profoundly uneasy with the corporate exploitation of his bright new students--'til that exploitation turns to something much worse. He has never anticipated a situation where the right thing to do is neither safe nor in the rules. A past Nebula Award winner. Reprint.