I assume that plant's is a contraction of plant is rather than the possessive. So, it means that the mission [goal of the task] is centered at the plant. NASA's "mission control" is somewhere in Texas, I believe.
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MadhulkYeah, but it's more likely to be the possessive. Because there's a tour guy
who shows every room in the plant. And finaly they get to the last room.
So what would it mean if it were a possessive?
This is the center of the work we do; this is where "everything happens".