LEGO City Undercover/Chapter 4: When the Going Gets Tough...

You start at the Docks behind the Cherry Tree Hill Police Station. Ellie will explain that you now be able to take a train to Bluebell National Park. You have to go there to find Clarence "Stinky" Fletcher which might be the old guy in the cutscene, once you get into the mining chambers.

Whistle whistle
So go to the nearest train station and accept the ride. When you reach the outside mine area, notice you can't go in yet. So in order for the mine workers to take a break, go to a shack with the robber crowbar sign. Attach and sound the horn so they can leave the area. Go in for your next assignment.

''Train stations are rarely important when you don't have cars to use. Along the rails, there are empty brick areas where you can build more train stations so look through the map and drive over there to confirm it. Last of all, don't bother driving on it, otherwise it will take forever.''

Special Assignment 3: Miner Altercation
Consider how big the mine area is, you'll need your wits to get through the assignment. So make your way to the top to the cabin where you find your mine outfit.

''Mine outfit is important for breaking grey boulders that you can't normally do with an average Lego person. So look out for places where it could hide icons or super bricks. The other important use is handling dynamites. Conveniently, you'll find it in like a soda can machine. If you're working in any assignment, you'll only have one use per area. Use it again and the machine explodes. But when you use dynamites outside, you can use it as many times as you want.''

The next area has one new feature that will tests your limits as a skydiving and I'm not talking just jumping out of aeroplanes!

''Skydiving can take practice and timing. to speed up and to slow down. You'll encounter studs in a circle and if you go through it, you'll take it all! Make sure to really avoid obstacles or you might start over in the middle of it as it can take quite a lot of getting use to. Keep a sharp eye as you go down the epic size of a mining cave!''

Assuming you get through all the trouble, you can get the recording of what happened to "Stinky".

''Cutscene summary. You meet Rex Fury but you'll end up seeing stars instead after he punched you. Then gets away in an ice-cream truck! You wake up seeing Natalia finding her dad and Huckleberry giving you a card to see Barry Smith at his dojo via Chinese Temple.''