Serena Sherran, a dedicated doctor, lost her husband, Leo Martin, to a mysterious case after the birth of their son, leaving her to raise him alone. When her son is diagnosed with the same heart condition as Leo, Serena makes a life altering decision: to leave behind the UK, and all the memories it holds, and move to China in search of a medical breakthrough. Five years later, a man named Jay Carson appears in her life-bearing an uncanny resemblance to her late husband, adding an unexpected twist to her journey.