Problem: Using netcat (nc) will be a necessity throughout your adventure. Can you connect to 2018shell.picoctf.com at port 49387 to get the flag?
Solution: Use linux or the https://2018game.picoctf.com/shell and use the following command.
nc 2018shell.picoctf.com 49387
This prints the flag to the console.
Flag: picoCTF{NEtcat_iS_a_NEcESSiTy_8b6a1fbc}