If you need a Plymouth suggestion Debbie ... Isaacs is always a good popular local dining spot ... right on the Main Street overlooking the waterfront across from the Mayflower.
http://www.isaacsdining.com/
http://www.isaacsdining.com/
If you have a group going to Isaacs for Saturday night,you will have to make reservations at least a few days ahead of time. The food there is very good. The restaurant is owned by a fellow police officer.
Debbie .... all taken care of for you.