Hello and thank you for your question. I look forward to assisting you today. First, remove all power from the laptop including the battery. If it is damaged beyond repair, your data will still be intact, but you will need to physically remove the drive then copy the contents to another computer.
My apologies as I should have indicated if possible.
It can be removed, but you will need to completely disassemble the entire laptop to gain access. You will also need to do that to remove the hard drive. The best way to try to recover from water damage is to place it in a dry warm environment for several days to let the water evaporate. You can also completely cover it with dry white rice for several days. That will draw the moisture out as well.
I would advise against that as they would charge you dearly for that. If you like, I can send you link that walks you through the dis-assembly process.
Once you have disassembled the laptop, leave it set for a day or so and it should dry out and you can try powering it up again. Here is your LINK.
How did you make out?