Sadness is an unavoidable response to “A Monster Calls.” Director J.A. Bayona (“The Orphanage,” “The Impossible”) is tasked with brightening up somber material, using heavy swings of fantasy to alleviate a tale that touches on terminal illness, bullying, and absentee parenting. While never jaunty, “A Monster Calls” does reach a compelling level of mystery to keep it on the move, working to wrap its arms around the saga of a teenage boy facing the grim reality of death for the first time in his life, turning to his imagination to help deal with a flurry of feelings. Behaviors ring true and performances are aces here, helping Bayona find the life in all the darkness, hitting proper tearjerker beats without corrupting a fascinating study of adolescent denial.  Read the rest at Blu-ray.com