Watch O Horizon for Free: How to Stream the Movie Online at 123Movies. . Abby, a brilliant, young neuroscientist who has recently lost her father, drowns her grief by spending her days working with a monkey named Dorey. Abby meets a programmer, Sam, who has created a technology that reconnects Abby with her beloved father. Her relationship with her digitized dad then forces her to re-examine everything from her romantic relationships to her life’s work.