Dr. Emilia Priestly goes to Mystery Island, a murder-mystery-themed resort, for a relaxing vacation. Tragedy strikes when the resort's founder is murdered, and Emilia, along with the local detective, must unravel the web of romance, revenge, and betrayal to find the killer.

Mystery Island success raises plans of expansion, and the Island team meets their Mystery Mountain counterparts for a friendly murder game, but the fun ends with a murder in plain sight.

Mystery Island hosts contest winners vying to solve a fake murder for a grand prize, but the event goes awry when an employee is murdered, and secrets are uncovered.

Mystery Island hosts a corporate retreat with a guest being Emilia's ex-fiancé. Old feelings become complicated, tensions run high, and allegations arise when a guest is found dead.