//one way
<?php query_posts('meta_key=movie&meta_value='.$s); ?>

//second way
    global $wpdb;
    // If you use a custom search form
    // $keyword = sanitize_text_field( $_POST['keyword'] );
    // If you use default WordPress search form
    $keyword = get_search_query();
    $keyword = '%' . like_escape( $keyword ) . '%'; // Thanks Manny Fleurmond
    // Search in all custom fields
    $post_ids_meta = $wpdb->get_col( $wpdb->prepare( "
    SELECT DISTINCT post_id FROM {$wpdb->postmeta}
    WHERE meta_value LIKE '%s'
    ", $keyword ) );
    // Search in post_title and post_content
    $post_ids_post = $wpdb->get_col( $wpdb->prepare( "
    SELECT DISTINCT ID FROM {$wpdb->posts}
    WHERE post_title LIKE '%s'
    OR post_content LIKE '%s'
    ", $keyword, $keyword ) );
    $post_ids = array_merge( $post_ids_meta, $post_ids_post );
    // Query arguments
    $args = array(
    'post_type' => 'post',
    'post_status' => 'publish',
    'post__in' => $post_ids,
    );
    $query = new WP_Query( $args );
    if ( $query->have_posts() ): while ( $query->have_posts() ) : $query->the_post();
    // Do loop here
    endwhile; endif;


//for pagination    
	$args['paged'] = max( get_query_var( 'paged' ), 1 );
    $query = new WP_Query( $args );