With Ticket In Hand?

All nouns (tickets, suitcases, books) here are countable and are singular, so I think that they will be subject to the indefinite article a. Is it wrong if it adds it? Do I need to use 'a' when adding adjectives such as "shining", "heavy", "thick" before nouns?

The next person in the row was already punching their tickets, so the conductor shrugged his tickets to Declan and kept on his work. They sat in the theater. In the theater it is much colder than at the mall, Caitlin wrapped for a cold. After seeing this, Dekran took off his coat and handed it to Caitlin. She accepted it with a smile and depended on him. When the screen opens, he stares at her and gets close at hand. She returned to work and Dicklan returned to her room. That evening supper, Declann realized that his father and mother appeared worried, but they said nothing to him. They did not even ask him about Caitlin. He is very convinced they will do, but they just eat their dinner quietly and sent Declan to the bed.

When I entered the theater and handed the ticket to the conductor, I saw the workers trying to ascertain whether the concert would work out in a hurry. Chrome plated borders are stacked in several corners, and occasionally someone picks up some tools. In the adjacent corner of the building there is a souvenir of Jars of Clay. There are a lot of posters, CDs, clothes, key holders and other visually attractive items on the table. As the crowd established, it headed for the door to the actual theater. You can see that certain fog machines are moving. There was a slight fog in the crack of the door. In the crowd's chat you can hear inconspicuous music. Behind these gates is a thrilling adventure