Alec Hardy and the mysterious heiress

Alec Hardy had just been appointed to the Broadchurch Police department after no-one else would take him. He has a secret to keep that his superiors can never know and he wasn't looking for a friend or an enemy and he found both. Can his new friend Rose Tyler keep his secret when she is his enemy's best friend and can he keeps hers? Set in the AU in the style of 'Human Nature'