I accidental went swimming with my iPod Touch 5th Generation
This is the generally first aid when a device gets wet.


TURN IT OFF as fast as possible. Don't even think about turning it on again till you are very sure it is dry. Don't try charging or plugging it in. Water and power do not mix well. 
While leaving it off and unplugged, stick it in a bag container with dry rice. Rice ascorbs moisture, and if there is any chance your device is not already broken beyond repair then it needs to be completely dry before any attempt is made to turn it on again. 
leave it in the rice for a week or so. 
Remove it from the rice, turn it back on and hope for the best. If you are lucky it might still work. If it doesnt Apple can sometimes fix things but as it is water damage it will have voided any warranty and it will be somewhat expensive. 


In your case since you already tried to turn it while possibly still wet, there is a good chance the circuits have unfortunately already been fried, leaving going to Apple or another fixit company as one solution or buying a new device as the other.