The Mysterious Visitor of Vashon Island is a chilling mystery set in the fog drenched summer of 1940s Washington State. When an unmarked boat drifts ashore near the Point Robinson Lighthouse, strange phenomena begin to haunt the quiet island town, alien broadcasts interrupt the local KIRO radio, colorful orbs spiral from the lighthouse, and townspeople start behaving strangely.
Teenagers Emma Sinclair and Tommy Adler uncover a terrifying truth: a mysterious visitor has returned to awaken an ancient force hidden beneath the island. Armed only with a diary, a reel-to-reel recorder, and a black stone that speaks in dreams, the two must decode cryptic signals, face otherworldly changes in their community, and shut down a cosmic machine before it completes its cycle.