Cal is released from jail by DCI Bell and colludes with him in a plan to smoke out the hitman. As Cal waits it out, his team pin the author of the anonymous letters to a City wideboy named Dominic Foy. The discovery that he had a sexual history with Sonia leads the team to suspect that he's guilty, but is Stephen also hiding something from them? How did Sonia know she had a job in Stephen's office one month before he interviewed her? Meanwhile, Cal's personal and professional life gets hopelessly tangled when Anne Collins urges him to meet her at a hotel. Their passion is leading them towards love, but the costs of this are explosive.