Alexandre Schmidt, a successful and emotionally detached architect, embarks on a trip to Italy to study the works of famous Baroque architect Francesco Borromini. Accompanied by his wife, Aliénor, who longs to rekindle their strained relationship, they encounter 18-year-old Goffredo and his sister Lavinia in Stresa. Goffredo, an aspiring architect passionate about history and beauty, seeks guidance from Alexandre. Lavinia, meanwhile, suffers from a mysterious fainting condition that deeply concerns her brother. The couples' lives intertwine, and each character begins to confront their personal struggles and desires.

As Alexandre explores Borromini's architectural masterpieces with Goffredo, they discuss the spiritual essence of architecture and the human experience. The bond between them grows, challenging Alexandre to reconsider his professional ambitions and the emotional void in his life. Aliénor and Lavinia also develop a close connection, sharing their fears and hopes. The journey to uncover Borromini's legacy subtly catalyzes transformation and healing in their lives, leaving both couples profoundly changed by the end of their Italian sojourn.