Bea (Cailey Fleming) moves in with her grandmother (Fiona Shaw) so she can be close to her father (John Krasinski), who is receiving cancer treatment at a local hospital. It’s a difficult period for everyone involved, yet the young girl finds things increasingly strange when she meets "Blosson," "Blue" (who appears purple), and their caretaker, "Cal" (Ryan Reynolds), living in the apartment above. She soon learns about “IFs” and is shown many of them, now lost because the people they were connected to have matured and no longer remember them. "Cal" and his companions are attempting to find new homes for these imaginative creatures, and Bea offers her assistance. Their initial focus is on "Benjamin," a boy in the same hospital as her dad who frequently breaks bones; despite seeming happy and kind, he seems quite isolated. As events unfold, it becomes apparent that Benjamin isn’t the only one needing an IF. While the film borrows from other stories at times, Cailey Fleming delivers a captivating performance, complemented by vibrant visual effects that are skillfully woven into the narrative, along with upbeat dialogue and several pleasant supporting characters who seem like they could have come straight out of a toy box (the bear and the marshmallow were highlights for me). Ryan Reynolds also holds back enough to avoid dominating the film. It’s a gentle story concerning family, feelings of isolation, and the process of growing up that inspires viewers to embrace their creativity. I wasn't anticipating it, but I ended up finding it quite enjoyable.

Source on TMDB