While working on restoring an Elizabethan garden, Rosemary witnesses the owner's cousin commit suicide only to later see him alive and well at an open-air market.
While creating a memorial garden and helping to solve a murder, Laura tries to repair her relationship with her estranged daughter following her divorce.
Quinnie Dorell, hostess of a TV gardening show, fills in for Rosemary, who is sidelined with a broken leg, in solving the murder of an investigative reporter.
Bending over backwards to prepare an Italian restaurant for its grand opening, Laura and Rosemary play investigators when an English private detective is murdered. Blackmail, scandal and much more are revealed as the mystery is solved.
Laura is distressed to hear that Rosemary was shot dead while working at Engleton Park; but finds a very lively corpse at the home Rosemary's mother. Bodies, motives, suspects and clues pile up around an archaeological mystery.
Investigating a disease that is attacking the competing gardens of a small town, Rosemary and Thyme are put in the middle of murder involving revenge and whole lot of competition.