The Ghost Club goes to the park and meets Jasper, who hears a voice in the trees. Later they learn about the Tongva — Indigenous people of Los Angeles.

Zen and her mom Atomic Nancy, a fluffy ghost with a punky past, help the kids investigate strange noises at the Bob Baker Marionette Theater.

The team interviews Yulissa, who teaches Oaxacan music. She's looking for her missing friend Chepe, a colorful ghost who communicates by whistling.