Magnum starts following Higgins to discover what she's been hiding, as she's secretly assigned to infiltrate a group threatening to take down MI-6. Also, Rick struggles after an explosion takes the life of someone important to him.

When a woman hires Magnum and Higgins to locate a man she met briefly at a coffee shop and felt a spark with, they learn that he is hiding a big secret. Also, Higgins keeps a secret of her own after she has a romantic dream about Magnum.