In the land of ten thousand lakes, Leech Lake stands out, because it's the third largest lake located entirely within the state of Minnesota. Known as a destination for walleye, pike and muskie fishing, Leech Lake attracts fishermen from all over the Midwest... and that's where the trouble began. Fishermen from the Ohio River Basin brought rusty crawfish up to Leech Lake as bait... and when done fishing, they released them, inadvertently giving the rusty crayfish a new home. Now, the rustys are pushing out the native crayfish, and destroying the weed beds the muskie, pike and walleye depend on. Fishing guide Phil Bauerly sees the destruction daily. To combat the rustys, Phil regularly throws lakeside crayfish boils for family and friends... and Yia just received his invitation to join.