Equipped with a burner phone and a new job, Cassie Peters has left her hectic and secretive life in New York City for the refuge of her hometown of Mammoth Lakes, California. There, she begins working again with Yosemite Search and Rescue, where a case she worked a decade ago continues to haunt her. She quickly falls into old patterns, joining a group of fellow seasonal workers and young adventurers who have made Yosemite their home during the summer....

After Jeff Manning suddenly dies, two women who loved him--his wife, Claire, and his co-worker, Tish--are both sent reeling and must figure out how to cope.