Jane's summer vacation is interrupted when she arrives at the lodge of her Aunt and Uncle, and finds out about a mysterious formula. Her friend is plunged into a difficult situation, and needs the help of Jane Darcy to get to the bottom of the mystery! Will you be able to find the hidden formula, before it's too late? Unravel a web of secrets and put your sleuthing skills to the test, as you take on the risky mystery of Formula for Danger!