Hi @heavymetalfan ,
Without knowing the exact make and model number I can only supply a general answer as to what to try.
Once you find out the make and model number, use the search box at the top of this page to check if there are any repair guides for the phone.
Did you backup your data to the cloud or a computer at all before the accident occurred? At least that way you may not have lost too much personal information if the phone cannot be restored.
''The water causes corrosion and provides circuit paths for the electricity which were not in the phone's operating design and could damage the components. The corrosion starts immediately and is ongoing until it is completely cleaned away''
''First '''do not try to charge or to turn on your phone''' and then '''remove the battery as soon as possible''' from the phone'' to minimize any further damage.
Then you need to dis-assemble the rest of the phone and clean ''all the affected parts'' using '''Isopropyl Alcohol 99%+''' (available at electronics parts stores) to remove all traces of corrosion and water. If possible do not use "rubbing alcohol" as in some cases this is only 70% IPA or less, can contain additives and is not as effective. If you do have to use it, check the label to verify the amount of IPA. The higher the percentage of IPA the better.
Here is a link that describes the process. [[Electronics Water Damage]]
As always with electronics, especially surface mounted pcb be gentle when handling and especially when brushing away the corrosion. You do not want to remove any components from the board. Remove the shields that may be covering some components as the water may have got in under there and corrosion is occurring there also. The ends of any flex cables and their connectors need to be cleaned as well.
Hopefully after you have done all this the phone ''might'' possibly work correctly again.
''If'' the phone is a Nexus 6 then here are the ifixit [[Topic:Nexus 6]] guides.
If this process seems too daunting, take your phone to a reputable, professional phone repair service, experienced in liquid damage repair and ask for a quote for a repair. If you decide to do this, ''do it sooner than later''. It may be the only way to retrieve your data if at all possible.