This case study delves into the complex case of Jayne, a 22-year-old university student facing health issues stemming from substance abuse and mental health concerns. The assignment focuses on assessing Jayne's condition, including her low mood, cannabis use, history of drug and alcohol misuse, and the distressing voices she experiences. The essay explores the necessity of various assessment tools, such as the ASSIST, AUDIT, SADQ, MSE, and SRAT, to develop an effective care plan. It emphasizes the importance of dual diagnosis, health promotion, and recovery concepts. The care plan encompasses a holistic approach, involving Jayne, her family, and other caregivers, and discusses potential interventions, including medication, motivational interviewing, and referral to support groups. The study highlights the significance of understanding the illness and implementing a strategic treatment plan to improve Jayne's overall well-being and facilitate her recovery.